WHO: Slight cancer risk after Japan nuke accident

LONDON (AP) — Two years after Japan's nuclear plant disaster, an international team of experts said Thursday that residents of areas hit by the highest doses of radiation face an increased cancer risk so small it probably won't be detectable.

In fact, experts calculated that increase at about 1 extra percentage point added to a Japanese infant's lifetime cancer risk.

"The additional risk is quite small and will probably be hidden by the noise of other (cancer) risks like people's lifestyle choices and statistical fluctuations," said Richard Wakeford of the University of Manchester, one of the authors of the report. "It's more important not to start smoking than having been in Fukushima."

The report was issued by the World Health Organization, which asked scientists to study the health effects of the disaster in Fukushima, a rural farming region.

On March 11, 2011, an earthquake and tsunami knocked out the Fukushima plant's power and cooling systems, causing meltdowns in three reactors and spewing radiation into the surrounding air, soil and water. The most exposed populations were directly under the plumes of radiation in the most affected communities in Fukushima, which is about 150 miles (240 kilometers) north of Tokyo.

In the report, the highest increases in risk are for people exposed as babies to radiation in the most heavily affected areas. Normally in Japan, the lifetime risk of developing cancer of an organ is about 41 percent for men and 29 percent for women. The new report said that for infants in the most heavily exposed areas, the radiation from Fukushima would add about 1 percentage point to those numbers.

Experts had been particularly worried about a spike in thyroid cancer, since radioactive iodine released in nuclear accidents is absorbed by the thyroid, especially in children. After the Chernobyl disaster, about 6,000 children exposed to radiation later developed thyroid cancer because many drank contaminated milk after the accident.

In Japan, dairy radiation levels were closely monitored, but children are not big milk drinkers there.

The WHO report estimated that women exposed as infants to the most radiation after the Fukushima accident would have a 70 percent higher chance of getting thyroid cancer in their lifetimes. But thyroid cancer is extremely rare and one of the most treatable cancers when caught early. A woman's normal lifetime risk of developing it is about 0.75 percent. That number would rise by 0.5 under the calculated increase for women who got the highest radiation doses as infants.

Wakeford said the increase may be so small it will probably not be observable.

For people beyond the most directly affected areas of Fukushima, Wakeford said the projected cancer risk from the radiation dropped dramatically. "The risks to everyone else were just infinitesimal."

David Brenner of Columbia University in New York, an expert on radiation-induced cancers, said that although the risk to individuals is tiny outside the most contaminated areas, some cancers might still result, at least in theory. But they'd be too rare to be detectable in overall cancer rates, he said.

Brenner said the numerical risk estimates in the WHO report were not surprising. He also said they should be considered imprecise because of the difficulty in determining risk from low doses of radiation. He was not connected with the WHO report.

Some experts said it was surprising that any increase in cancer was even predicted.

"On the basis of the radiation doses people have received, there is no reason to think there would be an increase in cancer in the next 50 years," said Wade Allison, an emeritus professor of physics at Oxford University, who also had no role in developing the new report. "The very small increase in cancers means that it's even less than the risk of crossing the road," he said.

WHO acknowledged in its report that it relied on some assumptions that may have resulted in an overestimate of the radiation dose in the general population.

Gerry Thomas, a professor of molecular pathology at Imperial College London, accused the United Nations health agency of hyping the cancer risk.

"It's understandable that WHO wants to err on the side of caution, but telling the Japanese about a barely significant personal risk may not be helpful," she said.

Thomas said the WHO report used inflated estimates of radiation doses and didn't properly take into account Japan's quick evacuation of people from Fukushima.

"This will fuel fears in Japan that could be more dangerous than the physical effects of radiation," she said, noting that people living under stress have higher rates of heart problems, suicide and mental illness.

In Japan, Norio Kanno, the chief of Iitate village, in one of the regions hardest hit by the disaster, harshly criticized the WHO report on Japanese public television channel NHK, describing it as "totally hypothetical."

Many people who remain in Fukushima still fear long-term health risks from the radiation, and some refuse to let their children play outside or eat locally grown food.

Some restrictions have been lifted on a 12-mile (20-kilometer) zone around the nuclear plant. But large sections of land in the area remain off-limits. Many residents aren't expected to be able to return to their homes for years.

Kanno accused the report's authors of exaggerating the cancer risk and stoking fear among residents.

"I'm enraged," he said.

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Mari Yamaguchi in Tokyo and AP Science Writer Malcolm Ritter in New York contributed to this report.

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Online:

WHO report: http://bit.ly/YDCXcb

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WHO: Slight cancer risk after Japan nuke accident

LONDON (AP) — Two years after Japan's nuclear plant disaster, an international team of experts said Thursday that residents of areas hit by the highest doses of radiation face an increased cancer risk so small it probably won't be detectable.

In fact, experts calculated that increase at about 1 extra percentage point added to a Japanese infant's lifetime cancer risk.

"The additional risk is quite small and will probably be hidden by the noise of other (cancer) risks like people's lifestyle choices and statistical fluctuations," said Richard Wakeford of the University of Manchester, one of the authors of the report. "It's more important not to start smoking than having been in Fukushima."

The report was issued by the World Health Organization, which asked scientists to study the health effects of the disaster in Fukushima, a rural farming region.

On March 11, 2011, an earthquake and tsunami knocked out the Fukushima plant's power and cooling systems, causing meltdowns in three reactors and spewing radiation into the surrounding air, soil and water. The most exposed populations were directly under the plumes of radiation in the most affected communities in Fukushima, which is about 150 miles (240 kilometers) north of Tokyo.

In the report, the highest increases in risk are for people exposed as babies to radiation in the most heavily affected areas. Normally in Japan, the lifetime risk of developing cancer of an organ is about 41 percent for men and 29 percent for women. The new report said that for infants in the most heavily exposed areas, the radiation from Fukushima would add about 1 percentage point to those numbers.

Experts had been particularly worried about a spike in thyroid cancer, since radioactive iodine released in nuclear accidents is absorbed by the thyroid, especially in children. After the Chernobyl disaster, about 6,000 children exposed to radiation later developed thyroid cancer because many drank contaminated milk after the accident.

In Japan, dairy radiation levels were closely monitored, but children are not big milk drinkers there.

The WHO report estimated that women exposed as infants to the most radiation after the Fukushima accident would have a 70 percent higher chance of getting thyroid cancer in their lifetimes. But thyroid cancer is extremely rare and one of the most treatable cancers when caught early. A woman's normal lifetime risk of developing it is about 0.75 percent. That number would rise by 0.5 under the calculated increase for women who got the highest radiation doses as infants.

Wakeford said the increase may be so small it will probably not be observable.

For people beyond the most directly affected areas of Fukushima, Wakeford said the projected cancer risk from the radiation dropped dramatically. "The risks to everyone else were just infinitesimal."

David Brenner of Columbia University in New York, an expert on radiation-induced cancers, said that although the risk to individuals is tiny outside the most contaminated areas, some cancers might still result, at least in theory. But they'd be too rare to be detectable in overall cancer rates, he said.

Brenner said the numerical risk estimates in the WHO report were not surprising. He also said they should be considered imprecise because of the difficulty in determining risk from low doses of radiation. He was not connected with the WHO report.

Some experts said it was surprising that any increase in cancer was even predicted.

"On the basis of the radiation doses people have received, there is no reason to think there would be an increase in cancer in the next 50 years," said Wade Allison, an emeritus professor of physics at Oxford University, who also had no role in developing the new report. "The very small increase in cancers means that it's even less than the risk of crossing the road," he said.

WHO acknowledged in its report that it relied on some assumptions that may have resulted in an overestimate of the radiation dose in the general population.

Gerry Thomas, a professor of molecular pathology at Imperial College London, accused the United Nations health agency of hyping the cancer risk.

"It's understandable that WHO wants to err on the side of caution, but telling the Japanese about a barely significant personal risk may not be helpful," she said.

Thomas said the WHO report used inflated estimates of radiation doses and didn't properly take into account Japan's quick evacuation of people from Fukushima.

"This will fuel fears in Japan that could be more dangerous than the physical effects of radiation," she said, noting that people living under stress have higher rates of heart problems, suicide and mental illness.

In Japan, Norio Kanno, the chief of Iitate village, in one of the regions hardest hit by the disaster, harshly criticized the WHO report on Japanese public television channel NHK, describing it as "totally hypothetical."

Many people who remain in Fukushima still fear long-term health risks from the radiation, and some refuse to let their children play outside or eat locally grown food.

Some restrictions have been lifted on a 12-mile (20-kilometer) zone around the nuclear plant. But large sections of land in the area remain off-limits. Many residents aren't expected to be able to return to their homes for years.

Kanno accused the report's authors of exaggerating the cancer risk and stoking fear among residents.

"I'm enraged," he said.

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Mari Yamaguchi in Tokyo and AP Science Writer Malcolm Ritter in New York contributed to this report.

__

Online:

WHO report: http://bit.ly/YDCXcb

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Advanced breast cancer edges up in younger women

CHICAGO (AP) — Advanced breast cancer has increased slightly among young women, a 34-year analysis suggests. The disease is still uncommon among women younger than 40, and the small change has experts scratching their heads about possible reasons.

The results are potentially worrisome because young women's tumors tend to be more aggressive than older women's, and they're much less likely to get routine screening for the disease.

Still, that doesn't explain why there'd be an increase in advanced cases and the researchers and other experts say more work is needed to find answers.

It's likely that the increase has more than one cause, said Dr. Rebecca Johnson, the study's lead author and medical director of a teen and young adult cancer program at Seattle Children's Hospital.

"The change might be due to some sort of modifiable risk factor, like a lifestyle change" or exposure to some sort of cancer-linked substance, she said.

Johnson said the results translate to about 250 advanced cases diagnosed in women younger than 40 in the mid-1970s versus more than 800 in 2009. During those years, the number of women nationwide in that age range went from about 22 million to closer to 30 million — an increase that explains part of the study trend "but definitely not all of it," Johnson said.

Other experts said women delaying pregnancy might be a factor, partly because getting pregnant at an older age might cause an already growing tumor to spread more quickly in response to pregnancy hormones.

Obesity and having at least a drink or two daily have both been linked with breast cancer but research is inconclusive on other possible risk factors, including tobacco and chemicals in the environment. Whether any of these explains the slight increase in advanced disease in young women is unknown.

There was no increase in cancer at other stages in young women. There also was no increase in advanced disease among women older than 40.

Overall U.S. breast cancer rates have mostly fallen in more recent years, although there are signs they may have plateaued.

Some 17 years ago, Johnson was diagnosed with early-stage breast cancer at age 27, and that influenced her career choice to focus on the disease in younger women.

"Young women and their doctors need to understand that it can happen in young women," and get checked if symptoms appear, said Johnson, now 44. "People shouldn't just watch and wait."

The authors reviewed a U.S. government database of cancer cases from 1976 to 2009. They found that among women aged 25 to 39, breast cancer that has spread to distant parts of the body — advanced disease — increased from between 1 and 2 cases per 100,000 women to about 3 cases per 100,000 during that time span.

The study was published Tuesday in the Journal of the American Medical Association.

About one in 8 women will develop breast cancer in their lifetime, but only 1 in 173 will develop it by age 40. Risks increase with age and certain gene variations can raise the odds.

Routine screening with mammograms is recommended for older women but not those younger than 40.

Dr. Len Lichtenfeld, the American Cancer Society's deputy chief medical officer, said the results support anecdotal reports but that there's no reason to start screening all younger women since breast cancer is still so uncommon for them.

He said the study "is solid and interesting and certainly does raise questions as to why this is being observed." One of the most likely reasons is probably related to changes in childbearing practices, he said, adding that the trend "is clearly something to be followed."

Dr. Ann Partridge, chair of the federal Centers for Disease Control and Prevention's advisory committee on breast cancer in young women, agreed but said it's also possible that doctors look harder for advanced disease in younger women than in older patients. More research is needed to make sure the phenomenon is real, said Partridge, director of a program for young women with breast cancer at the Harvard-affiliated Dana-Farber Cancer Institute.

The study shouldn't cause alarm, she said. Still, Partridge said young women should be familiar with their breasts and see the doctor if they notice any lumps or other changes.

Software engineer Stephanie Carson discovered a large breast tumor that had already spread to her lungs; that diagnosis in 2003 was a huge shock.

"I was so clueless," she said. "I was just 29 and that was the last thing on my mind."

Carson, who lives near St. Louis, had a mastectomy, chemotherapy, radiation and other treatments and she frequently has to try new drugs to keep the cancer at bay.

Because most breast cancer is diagnosed in early stages, there's a misconception that women are treated, and then get on with their lives, Carson said. She and her husband had to abandon hopes of having children, and she's on medical leave from her job.

"It changed the complete course of my life," she said. "But it's still a good life."

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Online:

JAMA: http://jama.ama-assn.org

CDC: http://www.cdc.gov/cancer/breast/index.htm

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FDA approves new targeted breast cancer drug

WASHINGTON (AP) — The Food and Drug Administration has approved a first-of-a-kind breast cancer medication that targets tumor cells while sparing healthy ones.

The drug Kadcyla from Roche combines the established drug Herceptin with a powerful chemotherapy drug and a third chemical linking the medicines together. The chemical keeps the cocktail intact until it binds to a cancer cell, delivering a potent dose of anti-tumor poison.

Cancer researchers say the drug is an important step forward because it delivers more medication while reducing the unpleasant side effects of chemotherapy.

"This antibody goes seeking out the tumor cells, gets internalized and then explodes them from within. So it's very kind and gentle on the patients — there's no hair loss, no nausea, no vomiting," said Dr. Melody Cobleigh of Rush University Medical Center. "It's a revolutionary way of treating cancer."

Cobleigh helped conduct the key studies of the drug at the Chicago facility.

The FDA approved the new treatment for about 20 percent of breast cancer patients with a form of the disease that is typically more aggressive and less responsive to hormone therapy. These patients have tumors that overproduce a protein known as HER-2. Breast cancer is the second most deadly form of cancer in U.S. women, and is expected to kill more than 39,000 Americans this year, according to the National Cancer Institute.

The approval will help Roche's Genentech unit build on the blockbuster success of Herceptin, which has long dominated the breast cancer marketplace. The drug had sales of roughly $6 billion last year.

Genentech said Friday that Kadcyla will cost $9,800 per month, compared to $4,500 per month for regular Herceptin. The company estimates a full course of Kadcyla, about nine months of medicine, will cost $94,000.

FDA scientists said they approved the drug based on company studies showing Kadcyla delayed the progression of breast cancer by several months. Researchers reported last year that patients treated with the drug lived 9.6 months before death or the spread of their disease, compared with a little more than six months for patients treated with two other standard drugs, Tykerb and Xeloda.

Overall, patients taking Kadcyla lived about 2.6 years, compared with 2 years for patients taking the other drugs.

FDA specifically approved the drug for patients with advanced breast cancer who have already been treated with Herceptin and taxane, a widely used chemotherapy drug. Doctors are not required to follow FDA prescribing guidelines, and cancer researchers say the drug could have great potential in patients with earlier forms of breast cancer

Kadcyla will carry a boxed warning, the most severe type, alerting doctors and patients that the drug can cause liver toxicity, heart problems and potentially death. The drug can also cause severe birth defects and should not be used by pregnant women.

Kadcyla was developed by South San Francisco-based Genentech using drug-binding technology licensed from Waltham, Mass.-based ImmunoGen. The company developed the chemical that keeps the drug cocktail together and is scheduled to receive a $10.5 million payment from Genentech on the FDA decision. The company will also receive additional royalties on the drug's sales.

Shares of ImmunoGen Inc. rose 2 cents to $14.32 in afternoon trading. The stock has ttraded in a 52-wek range of $10.85 to $18.10.

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FDA approves new targeted breast cancer drug

WASHINGTON (AP) — The Food and Drug Administration has approved a first-of-a-kind breast cancer medication that targets tumor cells while sparing healthy ones.

The drug Kadcyla from Roche combines the established drug Herceptin with a powerful chemotherapy drug and a third chemical linking the medicines together. The chemical keeps the cocktail intact until it binds to a cancer cell, delivering a potent dose of anti-tumor poison.

Cancer researchers say the drug is an important step forward because it delivers more medication while reducing the unpleasant side effects of chemotherapy.

"This antibody goes seeking out the tumor cells, gets internalized and then explodes them from within. So it's very kind and gentle on the patients — there's no hair loss, no nausea, no vomiting," said Dr. Melody Cobleigh of Rush University Medical Center. "It's a revolutionary way of treating cancer."

Cobleigh helped conduct the key studies of the drug at the Chicago facility.

The FDA approved the new treatment for about 20 percent of breast cancer patients with a form of the disease that is typically more aggressive and less responsive to hormone therapy. These patients have tumors that overproduce a protein known as HER-2. Breast cancer is the second most deadly form of cancer in U.S. women, and is expected to kill more than 39,000 Americans this year, according to the National Cancer Institute.

The approval will help Roche's Genentech unit build on the blockbuster success of Herceptin, which has long dominated the breast cancer marketplace. The drug had sales of roughly $6 billion last year.

Genentech said Friday that Kadcyla will cost $9,800 per month, compared to $4,500 per month for regular Herceptin. The company estimates a full course of Kadcyla, about nine months of medicine, will cost $94,000.

FDA scientists said they approved the drug based on company studies showing Kadcyla delayed the progression of breast cancer by several months. Researchers reported last year that patients treated with the drug lived 9.6 months before death or the spread of their disease, compared with a little more than six months for patients treated with two other standard drugs, Tykerb and Xeloda.

Overall, patients taking Kadcyla lived about 2.6 years, compared with 2 years for patients taking the other drugs.

FDA specifically approved the drug for patients with advanced breast cancer who have already been treated with Herceptin and taxane, a widely used chemotherapy drug. Doctors are not required to follow FDA prescribing guidelines, and cancer researchers say the drug could have great potential in patients with earlier forms of breast cancer

Kadcyla will carry a boxed warning, the most severe type, alerting doctors and patients that the drug can cause liver toxicity, heart problems and potentially death. The drug can also cause severe birth defects and should not be used by pregnant women.

Kadcyla was developed by South San Francisco-based Genentech using drug-binding technology licensed from Waltham, Mass.-based ImmunoGen. The company developed the chemical that keeps the drug cocktail together and is scheduled to receive a $10.5 million payment from Genentech on the FDA decision. The company will also receive additional royalties on the drug's sales.

Shares of ImmunoGen Inc. rose 2 cents to $14.32 in afternoon trading. The stock has ttraded in a 52-wek range of $10.85 to $18.10.

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Flu shot doing poor job of protecting older people

ATLANTA (AP) — It turns out this year's flu shot is doing a startlingly dismal job of protecting older people, the most vulnerable age group.

The vaccine is proving only 9 percent effective in those 65 and older against the harsh strain of the flu that is predominant this season, the Centers for Disease Control and Prevention said Thursday.

Health officials are baffled as to why this is so. But the findings help explain why so many older people have been hospitalized with the flu this year.

Despite the findings, the CDC stood by its recommendation that everyone over 6 months get flu shots, the elderly included, because some protection is better than none, and because those who are vaccinated and still get sick may suffer less severe symptoms.

"Year in and year out, the vaccine is the best protection we have," said CDC flu expert Dr. Joseph Bresee.

Overall, across the age groups studied, the vaccine's effectiveness was found to be a moderate 56 percent, which means those who got a shot have a 56 percent lower chance of winding up at the doctor with the flu. That is somewhat worse than what has been seen in other years.

For those 65 and older, the vaccine was only 27 percent effective against the three strains it is designed to protect against, the worst level in about a decade. It did a particularly poor job against the tough strain that is causing more than three-quarters of the illnesses this year.

It is well known that flu vaccine tends to protect younger people better than older ones. Elderly people have weaker immune systems that don't respond as well to flu shots, and they are more vulnerable to the illness and its complications, including pneumonia.

But health officials said they don't know why this year's vaccine did so poorly in that age group.

One theory, as yet unproven, is that older people's immune systems were accustomed to strains from the last two years and had more trouble switching gears to handle this year's different, harsh strain.

The preliminary data for senior citizens is less than definitive. It is based on fewer than 300 people scattered among five states.

But it will no doubt surprise many people that the effectiveness is that low, said Michael Osterholm, a University of Minnesota infectious-disease expert who has tried to draw attention to the need for a more effective flu vaccine.

Among infectious diseases, flu is considered one of the nation's leading killers. On average, about 24,000 Americans die each flu season, according to the CDC.

This flu season started in early December, a month earlier than usual, and peaked by the end of year. Hospitalization rates for people 65 and older have been some of the highest in a decade, at 146 per 100,000 people.

Flu viruses tend to mutate more quickly than others, so a new vaccine is formulated each year to target the strains expected to be the major threats. CDC officials have said that in formulating this year's vaccine, scientists accurately anticipated the strains that are circulating this season.

Because of the guesswork involved, scientists tend to set a lower bar for flu vaccine. While childhood vaccines against diseases like measles are expected to be 90 or 95 percent effective, a flu vaccine that's 60 to 70 percent effective in the U.S. is considered pretty good. By that standard, this year's vaccine is OK.

For senior citizens, a flu vaccine is considered pretty good if it's in the 30 to 40 percent range, said Dr. Arnold Monto, a University of Michigan flu expert.

A high-dose version of the flu shot was recently made available for those 65 and older, but the new study was too small to show whether that has made a difference.

The CDC estimates are based on about 2,700 people who got sick in December and January. The researchers traced back to see who had gotten shots and who hadn't. An earlier, smaller study put the vaccine's overall effectiveness at 62 percent, but other factors that might have influenced that figure weren't taken into account.

The CDC's Bresee said there is a danger in providing preliminary results because it may result in people doubting — or skipping — flu shots. But the figures were released to warn older people who got shots that they may still get sick and shouldn't ignore any serious flu-like symptoms, he said.

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Online:

CDC report: http://www.cdc.gov/mmwr

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Drug overdose deaths up for 11th consecutive year

CHICAGO (AP) — Drug overdose deaths rose for the 11th straight year, federal data show, and most of them were accidents involving addictive painkillers despite growing attention to risks from these medicines.

"The big picture is that this is a big problem that has gotten much worse quickly," said Dr. Thomas Frieden, head of the Centers for Disease Control and Prevention, which gathered and analyzed the data.

In 2010, the CDC reported, there were 38,329 drug overdose deaths nationwide. Medicines, mostly prescription drugs, were involved in nearly 60 percent of overdose deaths that year, overshadowing deaths from illicit narcotics.

The report appears in Tuesday's Journal of the American Medical Association.

It details which drugs were at play in most of the fatalities. As in previous recent years, opioid drugs — which include OxyContin and Vicodin — were the biggest problem, contributing to 3 out of 4 medication overdose deaths.

Frieden said many doctors and patients don't realize how addictive these drugs can be, and that they're too often prescribed for pain that can be managed with less risky drugs.

They're useful for cancer, "but if you've got terrible back pain or terrible migraines," using these addictive drugs can be dangerous, he said.

Medication-related deaths accounted for 22,134 of the drug overdose deaths in 2010.

Anti-anxiety drugs including Valium were among common causes of medication-related deaths, involved in almost 30 percent of them. Among the medication-related deaths, 17 percent were suicides.

The report's data came from death certificates, which aren't always clear on whether a death was a suicide or a tragic attempt at getting high. But it does seem like most serious painkiller overdoses were accidental, said Dr. Rich Zane, chair of emergency medicine at the University of Colorado School of Medicine.

The study's findings are no surprise, he added. "The results are consistent with what we experience" in ERs, he said, adding that the statistics no doubt have gotten worse since 2010.

Some experts believe these deaths will level off. "Right now, there's a general belief that because these are pharmaceutical drugs, they're safer than street drugs like heroin," said Don Des Jarlais, director of the chemical dependency institute at New York City's Beth Israel Medical Center.

"But at some point, people using these drugs are going to become more aware of the dangers," he said.

Frieden said the data show a need for more prescription drug monitoring programs at the state level, and more laws shutting down "pill mills" — doctor offices and pharmacies that over-prescribe addictive medicines.

Last month, a federal panel of drug safety specialists recommended that Vicodin and dozens of other medicines be subjected to the same restrictions as other narcotic drugs like oxycodone and morphine. Meanwhile, more and more hospitals have been establishing tougher restrictions on painkiller prescriptions and refills.

One example: The University of Colorado Hospital in Aurora is considering a rule that would ban emergency doctors from prescribing more medicine for patients who say they lost their pain meds, Zane said.

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Stobbe reported from Atlanta.

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Online:

JAMA: http://www.jama.ama-assn.org

CDC: http://www.cdc.gov

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AP Medical Writer Lindsey Tanner can be reached at http://www.twitter.com

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Hip implants a bit more likely to fail in women

CHICAGO (AP) — Hip replacements are slightly more likely to fail in women than in men, according to one of the largest studies of its kind in U.S. patients. The risk of the implants failing is low, but women were 29 percent more likely than men to need a repeat surgery within the first three years.

The message for women considering hip replacement surgery remains unclear. It's not known which models of hip implants perform best in women, even though women make up the majority of the more than 400,000 Americans who have full or partial hip replacements each year to ease the pain and loss of mobility caused by arthritis or injuries.

"This is the first step in what has to be a much longer-term research strategy to figure out why women have worse experiences," said Diana Zuckerman, president of the nonprofit National Research Center for Women & Families. "Research in this area could save billions of dollars" and prevent patients from experiencing the pain and inconvenience of surgeries to fix hip implants that go wrong.

Researchers looked at more than 35,000 surgeries at 46 hospitals in the Kaiser Permanente health system. The research, published Monday in JAMA Internal Medicine, was funded by the U.S. Food and Drug Administration.

After an average of three years, 2.3 percent of the women and 1.9 percent of the men had undergone revision surgery to fix a problem with the original hip replacement. Problems included instability, infection, broken bones and loosening.

"There is an increased risk of failure in women compared to men," said lead author Maria Inacio, an epidemiologist at Southern California Permanente Medical Group in San Diego. "This is still a very small number of failures."

Women tend to have smaller joints and bones than men, and so they tend to need smaller artificial hips. Devices with smaller femoral heads — the ball-shaped part of the ball-and-socket joint in an artificial hip — are more likely to dislocate and require a surgical repair.

That explained some, but not all, of the difference between women and men in the study. It's not clear what else may have contributed to the gap. Co-author Dr. Monti Khatod, an orthopedic surgeon in Los Angeles, speculated that one factor may be a greater loss of bone density in women.

The failure of metal-on-metal hips was almost twice as high for women than in men. The once-popular models were promoted by manufacturers as being more durable than standard plastic or ceramic joints, but several high-profile recalls have led to a decrease in their use in recent years.

"Don't be fooled by hype about a new hip product," said Zuckerman, who wrote an accompanying commentary in the medical journal. "I would not choose the latest, greatest hip implant if I were a woman patient. ... At least if it's been for sale for a few years, there's more evidence for how well it's working."

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Online:

Journal: http://www.jamainternalmed.com

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Study: Better TV might improve kids' behavior

SEATTLE (AP) — Teaching parents to switch channels from violent shows to educational TV can improve preschoolers' behavior, even without getting them to watch less, a study found.

The results were modest and faded over time, but may hold promise for finding ways to help young children avoid aggressive, violent behavior, the study authors and other doctors said.

"It's not just about turning off the television. It's about changing the channel. What children watch is as important as how much they watch," said lead author Dr. Dimitri Christakis, a pediatrician and researcher at Seattle Children's Research Institute.

The research was to be published online Monday by the journal Pediatrics.

The study involved 565 Seattle parents, who periodically filled out TV-watching diaries and questionnaires measuring their child's behavior.

Half were coached for six months on getting their 3-to-5-year-old kids to watch shows like "Sesame Street" and "Dora the Explorer" rather than more violent programs like "Power Rangers." The results were compared with kids whose parents who got advice on healthy eating instead.

At six months, children in both groups showed improved behavior, but there was a little bit more improvement in the group that was coached on their TV watching.

By one year, there was no meaningful difference between the two groups overall. Low-income boys appeared to get the most short-term benefit.

"That's important because they are at the greatest risk, both for being perpetrators of aggression in real life, but also being victims of aggression," Christakis said.

The study has some flaws. The parents weren't told the purpose of the study, but the authors concede they probably figured it out and that might have affected the results.

Before the study, the children averaged about 1½ hours of TV, video and computer game watching a day, with violent content making up about a quarter of that time. By the end of the study, that increased by up to 10 minutes. Those in the TV coaching group increased their time with positive shows; the healthy eating group watched more violent TV.

Nancy Jensen, who took part with her now 6-year-old daughter, said the study was a wake-up call.

"I didn't realize how much Elizabeth was watching and how much she was watching on her own," she said.

Jensen said her daughter's behavior improved after making changes, and she continues to control what Elizabeth and her 2-year-old brother, Joe, watch. She also decided to replace most of Elizabeth's TV time with games, art and outdoor fun.

During a recent visit to their Seattle home, the children seemed more interested in playing with blocks and running around outside than watching TV.

Another researcher who was not involved in this study but also focuses his work on kids and television commended Christakis for taking a look at the influence of positive TV programs, instead of focusing on the impact of violent TV.

"I think it's fabulous that people are looking on the positive side. Because no one's going to stop watching TV, we have to have viable alternatives for kids," said Dr. Michael Rich, director of the Center on Media and Child Health at Children's Hospital Boston.

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Online:

Pediatrics: http://www.pediatrics.org

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Contact AP Writer Donna Blankinship through Twitter (at)dgblankinship

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UN warns risk of hepatitis E in S. Sudan grows

GENEVA (AP) — The United Nations says an outbreak of hepatitis E has killed 111 refugees in camps in South Sudan since July, and has become endemic in the region.

U.N. refugee agency spokesman Adrian Edwards says the influx of people to the camps from neighboring Sudan is believed to be one of the factors in the rapid spread of the contagious, life-threatening inflammatory viral disease of the liver.

Edwards said Friday that the camps have been hit by 6,017 cases of hepatitis E, which is spread through contaminated food and water.

He says the largest number of cases and suspected cases is in the Yusuf Batil camp in Upper Nile state, which houses 37,229 refugees fleeing fighting between rebels and the Sudanese government.

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UN warns risk of hepatitis E in S. Sudan grows

GENEVA (AP) — The United Nations says an outbreak of hepatitis E has killed 111 refugees in camps in South Sudan since July, and has become endemic in the region.

U.N. refugee agency spokesman Adrian Edwards says the influx of people to the camps from neighboring Sudan is believed to be one of the factors in the rapid spread of the contagious, life-threatening inflammatory viral disease of the liver.

Edwards said Friday that the camps have been hit by 6,017 cases of hepatitis E, which is spread through contaminated food and water.

He says the largest number of cases and suspected cases is in the Yusuf Batil camp in Upper Nile state, which houses 37,229 refugees fleeing fighting between rebels and the Sudanese government.

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Study: Fish in drug-tainted water suffer reaction

BOSTON (AP) — What happens to fish that swim in waters tainted by traces of drugs that people take? When it's an anti-anxiety drug, they become hyper, anti-social and aggressive, a study found. They even get the munchies.

It may sound funny, but it could threaten the fish population and upset the delicate dynamics of the marine environment, scientists say.

The findings, published online Thursday in the journal Science, add to the mounting evidence that minuscule amounts of medicines in rivers and streams can alter the biology and behavior of fish and other marine animals.

"I think people are starting to understand that pharmaceuticals are environmental contaminants," said Dana Kolpin, a researcher for the U.S. Geological Survey who is familiar with the study.

Calling their results alarming, the Swedish researchers who did the study suspect the little drugged fish could become easier targets for bigger fish because they are more likely to venture alone into unfamiliar places.

"We know that in a predator-prey relation, increased boldness and activity combined with decreased sociality ... means you're going to be somebody's lunch quite soon," said Gregory Moller, a toxicologist at the University of Idaho and Washington State University. "It removes the natural balance."

Researchers around the world have been taking a close look at the effects of pharmaceuticals in extremely low concentrations, measured in parts per billion. Such drugs have turned up in waterways in Europe, the U.S. and elsewhere over the past decade.

They come mostly from humans and farm animals; the drugs pass through their bodies in unmetabolized form. These drug traces are then piped to water treatment plants, which are not designed to remove them from the cleaned water that flows back into streams and rivers.

The Associated Press first reported in 2008 that the drinking water of at least 51 million Americans carries low concentrations of many common drugs. The findings were based on questionnaires sent to water utilities, which reported the presence of antibiotics, sedatives, sex hormones and other drugs.

The news reports led to congressional hearings and legislation, more water testing and more public disclosure. To this day, though, there are no mandatory U.S. limits on pharmaceuticals in waterways.

The research team at Sweden's Umea University used minute concentrations of 2 parts per billion of the anti-anxiety drug oxazepam, similar to concentrations found in real waters. The drug belongs to a widely used class of medicines known as benzodiazepines that includes Valium and Librium.

The team put young wild European perch into an aquarium, exposed them to these highly diluted drugs and then carefully measured feeding, schooling, movement and hiding behavior. They found that drug-exposed fish moved more, fed more aggressively, hid less and tended to school less than unexposed fish. On average, the drugged fish were more than twice as active as the others, researcher Micael Jonsson said. The effects were more pronounced at higher drug concentrations.

"Our first thought is, this is like a person diagnosed with ADHD," said Jonsson, referring to attention deficit-hyperactivity disorder. "They become asocial and more active than they should be."

Tomas Brodin, another member of the research team, called the drug's environmental impact a global problem. "We find these concentrations or close to them all over the world, and it's quite possible or even probable that these behavioral effects are taking place as we speak," he said Thursday in Boston at the annual meeting of the American Association for the Advancement of Science.

Most previous research on trace drugs and marine life has focused on biological changes, such as male fish that take on female characteristics. However, a 2009 study found that tiny concentrations of antidepressants made fathead minnows more vulnerable to predators.

It is not clear exactly how long-term drug exposure, beyond the seven days in this study, would affect real fish in real rivers and streams. The Swedish researchers argue that the drug-induced changes could jeopardize populations of this sport and commercial fish, which lives in both fresh and brackish water.

Water toxins specialist Anne McElroy of Stony Brook University in New York agreed: "These lower chronic exposures that may alter things like animals' mating behavior or its ability to catch food or its ability to avoid being eaten — over time, that could really affect a population."

Another possibility, the researchers said, is that more aggressive feeding by the perch on zooplankton could reduce the numbers of these tiny creatures. Since zooplankton feed on algae, a drop in their numbers could allow algae to grow unchecked. That, in turn, could choke other marine life.

The Swedish team said it is highly unlikely people would be harmed by eating such drug-exposed fish. Jonsson said a person would have to eat 4 tons of perch to consume the equivalent of a single pill.

Researchers said more work is needed to develop better ways of removing drugs from water at treatment plants. They also said unused drugs should be brought to take-back programs where they exist, instead of being flushed down the toilet. And they called on pharmaceutical companies to work on "greener" drugs that degrade more easily.

Sandoz, one of three companies approved to sell oxazepam in the U.S., "shares society's desire to protect the environment and takes steps to minimize the environmental impact of its products over their life cycle," spokeswoman Julie Masow said in an emailed statement. She provided no details.

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Online:

Overview of the drug: http://www.nlm.nih.gov/medlineplus/druginfo/meds/a682050.html

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Morning-after pill use up to 1 in 9 younger women

NEW YORK (AP) — About 1 in 9 younger women have used the morning-after pill after sex, according to the first government report to focus on emergency contraception since its approval 15 years ago.

The results come from a survey of females ages 15 to 44. Eleven percent of those who'd had sex reported using a morning-after pill. That's up from 4 percent in 2002, only a few years after the pills went on the market and adults still needed a prescription.

The increased popularity is probably because it is easier to get now and because of media coverage of controversial efforts to lift the age limit for over-the-counter sales, experts said. A prescription is still required for those younger than 17 so it is still sold from behind pharmacy counters.

In the study, half the women who used the pills said they did it because they'd had unprotected sex. Most of the rest cited a broken condom or worries that the birth control method they used had failed.

White women and more educated women use it the most, the research showed. That's not surprising, said James Trussell, a Princeton University researcher who's studied the subject.

"I don't think you can go to college in the United States and not know about emergency contraception," said Trussell, who has promoted its use and started a hot line.

One Pennsylvania college even has a vending machine dispensing the pills.

The morning-after pill is basically a high-dose version of birth control pills. It prevents ovulation and needs to be taken within a few days after sex. The morning-after pill is different from the so-called abortion pill, which is designed to terminate a pregnancy.

At least five versions of the morning-after pills are sold in the United States. They cost around $35 to $60 a dose at a pharmacy, depending on the brand.

Since it is sold over-the-counter, insurers generally only pay for it with a doctor's prescription. The new Affordable Care Act promises to cover morning-after pills, meaning no co-pays, but again only with a prescription.

The results of the study were released Thursday by the Centers for Disease Control and Prevention. It's based on in-person interviews of more than 12,000 women in 2006 through 2010. It was the agency's first in-depth report on that issue, said Kimberly Daniels, the study's lead author.

The study also found:

—Among different age groups, women in their early 20s were more likely to have taken a morning-after pill. About 1 in 4 did.

—About 1 in 5 never-married women had taken a morning-after pill, compared to just 1 in 20 married women.

—Of the women who used the pill, 59 percent said they had done it only once, 24 percent said twice, and 17 percent said three or more times.

A woman who uses emergency contraception multiple times "needs to be thinking about a more regular form" of birth control, noted Lawrence Finer, director of domestic research for the Guttmacher Institute, a nonprofit group that does research on reproductive health.

Also on Thursday, the CDC released a report on overall contraception use. Among its many findings, 99 percent of women who've had sex used some sort of birth control. That includes 82 percent who used birth control pills and 93 percent whose partner had used a condom.

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Online:

CDC report: http://www.cdc.gov/nchs/

Emergency contraception info: http://ec.princeton.edu/index.html

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Pope shows lifetime jobs aren't always for life

The world seems surprised that an 85-year-old globe-trotting pope who just started tweeting wants to resign, but should it be? Maybe what should be surprising is that more leaders his age do not, considering the toll aging takes on bodies and minds amid a culture of constant communication and change.

There may be more behind the story of why Pope Benedict XVI decided to leave a job normally held for life. But the pontiff made it about age. He said the job called for "both strength of mind and body" and said his was deteriorating. He spoke of "today's world, subject to so many rapid changes," implying a difficulty keeping up despite his recent debut on Twitter.

"This seemed to me a very brave, courageous decision," especially because older people often don't recognize their own decline, said Dr. Seth Landefeld, an expert on aging and chairman of medicine at the University of Alabama at Birmingham.

Age has driven many leaders from jobs that used to be for life — Supreme Court justices, monarchs and other heads of state. As lifetimes expand, the woes of old age are catching up with more in seats of power. Some are choosing to step down rather than suffer long declines and disabilities as the pope's last predecessor did.

Since 1955, only one U.S. Supreme Court justice — Chief Justice William Rehnquist — has died in office. Twenty-one others chose to retire, the most recent being John Paul Stevens, who stepped down in 2010 at age 90.

When Thurgood Marshall stepped down in 1991 at the age of 82, citing health reasons, the Supreme Court justice's answer was blunt: "What's wrong with me? I'm old. I'm getting old and falling apart."

One in 5 U.S. senators is 70 or older, and some have retired rather than seek new terms, such as Hawaii's Daniel Akaka, who left office in January at age 88.

The Netherlands' Queen Beatrix, who just turned 75, recently said she will pass the crown to a son and put the country "in the hands of a new generation."

In Germany, where the pope was born, Chancellor Angela Merkel, who is 58, said the pope's decision that he was no longer fit for the job "earns my very highest respect."

"In our time of ever-lengthening life, many people will be able to understand how the pope as well has to deal with the burdens of aging," she told reporters in Berlin.

Experts on aging agreed.

"People's mental capacities in their 80s and 90s aren't what they were in their 40s and 50s. Their short-term memory is often not as good, their ability to think quickly on their feet, to execute decisions is often not as good," Landefeld said. Change is tougher to handle with age, and leaders like popes and presidents face "extraordinary demands that would tax anybody's physical and mental stamina."

Dr. Barbara Messinger-Rapport, geriatrics chief at the Cleveland Clinic, noted that half of people 85 and older in developed countries have some dementia, usually Alzheimer's. Even without such a disease, "it takes longer to make decisions, it takes longer to learn new things," she said.

But that's far from universal, said Dr. Thomas Perls, an expert on aging at Boston University and director of the New England Centenarians Study.

"Usually a man who is entirely healthy in his early 80s has demonstrated his survival prowess" and can live much longer, he said. People of privilege have better odds because they have access to good food and health care, and tend to lead clean lives.

"Even in the 1500s and 1600s there were popes in their 80s. It's remarkable. That would be today's centenarians," Perls said.

Arizona Sen. John McCain turned 71 while running for president in 2007. Had he won, he would have been the oldest person elected to a first term as president. Ronald Reagan was days away from turning 70 when he started his first term as president in 1981; he won re-election in 1984. Vice President Joe Biden just turned 70.

In the U.S. Senate, where seniority is rewarded and revered, South Carolina's Strom Thurmond didn't retire until age 100 in 2002. Sen. Robert Byrd of West Virginia was the longest-serving senator when he died in office at 92 in 2010.

Now the oldest U.S. senator is 89-year-old Frank Lautenberg of New Jersey. The oldest congressman is Ralph Hall of Texas who turns 90 in May.

The legendary Alan Greenspan was about to turn 80 when he retired as chairman of the Federal Reserve in 2006; he still works as a consultant.

Elsewhere around the world, Cuba's Fidel Castro — one of the world's longest serving heads of state — stepped down in 2006 at age 79 due to an intestinal illness that nearly killed him, handing power to his younger brother Raul. But the island is an example of aged leaders pushing on well into their dotage. Raul Castro now is 81 and his two top lieutenants are also octogenarians. Later this month, he is expected to be named to a new, five-year term as president.

Other leaders who are still working:

—England's Queen Elizabeth, 86.

—Abdullah bin Abd al-Aziz al-Saud, king of Saudi Arabia, 88.

—Sabah al-Ahmad al-Jaber al-Sabah, emir of Kuwait, 83.

—Ruth Bader Ginsburg, U.S. Supreme Court associate justice, 79.

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Associated Press writers Paul Haven in Havana, Cuba; David Rising in Berlin; Seth Borenstein, Mark Sherman and Matt Yancey in Washington, and researcher Judy Ausuebel in New York contributed to this report.

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Marilynn Marchione can be followed at http://twitter.com/MMarchioneAP

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After early start, worst of flu season may be over

NEW YORK (AP) — The worst of the flu season appears to be over.

The number of states reporting intense or widespread illnesses dropped again last week, and in a few states there was very little flu going around, U.S. health officials said Friday.

The season started earlier than normal, first in the Southeast and then spreading. But now, by some measures, flu activity has been ebbing for at least four weeks in much of the country. Flu and pneumonia deaths also dropped the last two weeks, the Centers for Disease Control and Prevention reported.

"It's likely that the worst of the current flu season is over," CDC spokesman Tom Skinner said.

But flu is hard to predict, he and others stressed, and there have been spikes late in the season in the past.

For now, states like Georgia and New York — where doctor's offices were jammed a few weeks ago — are reporting low flu activity. The hot spots are now the West Coast and the Southwest.

Among the places that have seen a drop: Lehigh Valley Hospital-Cedar Crest in Allentown, Pa., which put up a tent outside its emergency room last month to help deal with the steady stream of patients. There were about 100 patients each day back then. Now it's down to 25 and the hospital may pack up its tent next week, said Terry Burger, director of infection control and prevention for the hospital.

"There's no question that we're seeing a decline," she said.

In early December, CDC officials announced flu season had arrived, a month earlier than usual. They were worried, saying it had been nine years since a winter flu season started like this one. That was 2003-04 — one of the deadliest seasons in the past 35 years, with more than 48,000 deaths.

Like this year, the major flu strain was one that tends to make people sicker, especially the elderly, who are most vulnerable to flu and its complications

But back then, that year's flu vaccine wasn't made to protect against that bug, and fewer people got flu shots. The vaccine is reformulated almost every year, and the CDC has said this year's vaccine is a good match to the types that are circulating. A preliminary CDC study showed it is about 60 percent effective, which is close to the average.

So far, the season has been labeled moderately severe.

Like others, Lehigh Valley's Burger was cautious about making predictions. "I'm not certain we're completely out of the woods," with more wintry weather ahead and people likely to be packed indoors where flu can spread around, she said.

The government does not keep a running tally of flu-related deaths in adults, but has received reports of 59 deaths in children. The most — nine — were in Texas, where flu activity was still high last week. Roughly 100 children die in an average flu season, the CDC says

On average, about 24,000 Americans die each flu season, according to the CDC.

According to the CDC report, the number of states with intense activity is down to 19, from 24 the previous week, and flu is widespread in 38 states, down from 42.

Flu is now minimal in Florida, Kentucky, Maine, Montana, New Hampshire and South Carolina.

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Online:

CDC: http://www.cdc.gov/flu/

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Southern diet, fried foods, may raise stroke risk

Deep-fried foods may be causing trouble in the Deep South. People whose diets are heavy on them and sugary drinks like sweet tea and soda were more likely to suffer a stroke, a new study finds.

It's the first big look at diet and strokes, and researchers say it might help explain why blacks in the Southeast — the nation's "stroke belt" — suffer more of them.

Blacks were five times more likely than whites to have the Southern dietary pattern linked with the highest stroke risk. And blacks and whites who live in the South were more likely to eat this way than people in other parts of the country were. Diet might explain as much as two-thirds of the excess stroke risk seen in blacks versus whites, researchers concluded.

"We're talking about fried foods, french fries, hamburgers, processed meats, hot dogs," bacon, ham, liver, gizzards and sugary drinks, said the study's leader, Suzanne Judd of the University of Alabama in Birmingham.

People who ate about six meals a week featuring these sorts of foods had a 41 percent higher stroke risk than people who ate that way about once a month, researchers found.

In contrast, people whose diets were high in fruits, vegetables, whole grains and fish had a 29 percent lower stroke risk.

"It's a very big difference," Judd said. "The message for people in the middle is there's a graded risk" — the likelihood of suffering a stroke rises in proportion to each Southern meal in a week.

Results were reported Thursday at an American Stroke Association conference in Honolulu.

The federally funded study was launched in 2002 to explore regional variations in stroke risks and reasons for them. More than 20,000 people 45 or older — half of them black — from all 48 mainland states filled out food surveys and were sorted into one of five diet styles:

—Southern: Fried foods, processed meats (lunchmeat, jerky), red meat, eggs, sweet drinks and whole milk.

—Convenience: Mexican and Chinese food, pizza, pasta.

—Plant-based: Fruits, vegetables, juice, cereal, fish, poultry, yogurt, nuts and whole-grain bread.

—Sweets: Added fats, breads, chocolate, desserts, sweet breakfast foods.

—Alcohol: Beer, wine, liquor, green leafy vegetables, salad dressings, nuts and seeds, coffee.

"They're not mutually exclusive" — for example, hamburgers fall into both convenience and Southern diets, Judd said. Each person got a score for each diet, depending on how many meals leaned that way.

Over more than five years of follow-up, nearly 500 strokes occurred. Researchers saw clear patterns with the Southern and plant-based diets; the other three didn't seem to affect stroke risk.

There were 138 strokes among the 4,977 who ate the most Southern food, compared to 109 strokes among the 5,156 people eating the least of it.

There were 122 strokes among the 5,076 who ate the most plant-based meals, compared to 135 strokes among the 5,056 people who seldom ate that way.

The trends held up after researchers took into account other factors such as age, income, smoking, education, exercise and total calories consumed.

Fried foods tend to be eaten with lots of salt, which raises blood pressure — a known stroke risk factor, Judd said. And sweet drinks can contribute to diabetes, the disease that celebrity chef Paula Deen — the queen of Southern cuisine — revealed she had a year ago.

The National Institute of Neurological Disorders and Stroke, drugmaker Amgen Inc. and General Mills Inc. funded the study.

"This study does strongly suggest that food does have an influence and people should be trying to avoid these kinds of fatty foods and high sugar content," said an independent expert, Dr. Brian Silver, a Brown University neurologist and stroke center director at Rhode Island Hospital.

"I don't mean to sound like an ogre. I know when I'm in New Orleans I certainly enjoy the food there. But you don't have to make a regular habit of eating all this stuff."

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Marilynn Marchione can be followed at http://twitter.com/MMarchioneAP

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New whooping cough strain in US raises questions

NEW YORK (AP) — Researchers have discovered the first U.S. cases of whooping cough caused by a germ that may be resistant to the vaccine.

Health officials are looking into whether cases like the dozen found in Philadelphia might be one reason the nation just had its worst year for whooping cough in six decades. The new bug was previously reported in Japan, France and Finland.

"It's quite intriguing. It's the first time we've seen this here," said Dr. Tom Clark of the Centers for Disease Control and Prevention.

The U.S. cases are detailed in a brief report from the CDC and other researchers in Thursday's New England Journal of Medicine.

Whooping cough is a highly contagious disease that can strike people of any age but is most dangerous to children. It was once common, but cases in the U.S. dropped after a vaccine was introduced in the 1940s.

An increase in illnesses in recent years has been partially blamed on a version of the vaccine used since the 1990s, which doesn't last as long. Last year, the CDC received reports of 41,880 cases, according to a preliminary count. That included 18 deaths.

The new study suggests that the new whooping cough strain may be why more people have been getting sick. Experts don't think it's more deadly, but the shots may not work as well against it.

In a small, soon-to-be published study, French researchers found the vaccine seemed to lower the risk of severe disease from the new strain in infants. But it didn't prevent illness completely, said Nicole Guiso of the Pasteur Institute, one of the researchers.

The new germ was first identified in France, where more extensive testing is routinely done for whooping cough. The strain now accounts for 14 percent of cases there, Guiso said.

In the United States, doctors usually rely on a rapid test to help make a diagnosis. The extra lab work isn't done often enough to give health officials a good idea how common the new type is here, experts said.

"We definitely need some more information about this before we can draw any conclusions," the CDC's Clark said.

The U.S. cases were found in the past two years in patients at St. Christopher's Hospital for Children in Philadelphia. One of the study's researchers works for a subsidiary of Johnson & Johnson, which makes a version of the old whooping cough vaccine that is sold in other countries.

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JournaL: http://www.nejm.org

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Critics seek to delay NYC sugary drinks size limit

NEW YORK (AP) — Opponents are pressing to delay enforcement of the city's novel plan to crack down on supersized, sugary drinks, saying businesses shouldn't have to spend millions of dollars to comply until a court rules on whether the measure is legal.

With the rule set to take effect March 12, beverage industry, restaurant and other business groups have asked a judge to put it on hold at least until there's a ruling on their lawsuit seeking to block it altogether. The measure would bar many eateries from selling high-sugar drinks in cups or containers bigger than 16 ounces.

"It would be a tremendous waste of expense, time, and effort for our members to incur all of the harm and costs associated with the ban if this court decides that the ban is illegal," Chong Sik Le, president of the New York Korean-American Grocers Association, said in court papers filed Friday.

City lawyers are fighting the lawsuit and oppose postponing the restriction, which the city Board of Health approved in September. They said Tuesday they expect to prevail.

"The obesity epidemic kills nearly 6,000 New Yorkers each year. We see no reason to delay the Board of Health's reasonable and legal actions to combat this major, growing problem," Mark Muschenheim, a city attorney, said in a statement.

Another city lawyer, Thomas Merrill, has said officials believe businesses have had enough time to get ready for the new rule. He has noted that the city doesn't plan to seek fines until June.

Mayor Michael Bloomberg and other city officials see the first-of-its-kind limit as a coup for public health. The city's obesity rate is rising, and studies have linked sugary drinks to weight gain, they note.

"This is the biggest step a city has taken to curb obesity," Bloomberg said when the measure passed.

Soda makers and other critics view the rule as an unwarranted intrusion into people's dietary choices and an unfair, uneven burden on business. The restriction won't apply at supermarkets and many convenience stores because the city doesn't regulate them.

While the dispute plays out in court, "the impacted businesses would like some more certainty on when and how they might need to adjust operations," American Beverage Industry spokesman Christopher Gindlesperger said Tuesday.

Those adjustments are expected to cost the association's members about $600,000 in labeling and other expenses for bottles, Vice President Mike Redman said in court papers. Reconfiguring "16-ounce" cups that are actually made slightly bigger, to leave room at the top, is expected to take cup manufacturers three months to a year and cost them anywhere from more than $100,000 to several millions of dollars, Foodservice Packaging Institute President Lynn Dyer said in court documents.

Movie theaters, meanwhile, are concerned because beverages account for more than 20 percent of their overall profits and about 98 percent of soda sales are in containers greater than 16 ounces, according to Robert Sunshine, executive director of the National Association of Theatre Owners of New York State.

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Follow Jennifer Peltz at http://twitter.com/jennpeltz

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Bullying study: It does get better for gay teens

CHICAGO (AP) — It really does get better for gay and bisexual teens when it comes to being bullied, although young gay men have it worse than their lesbian peers, according to the first long-term scientific evidence on how the problem changes over time.

The seven-year study involved more than 4,000 teens in England who were questioned yearly through 2010, until they were 19 and 20 years old. At the start, just over half of the 187 gay, lesbian and bisexual teens said they had been bullied; by 2010 that dropped to 9 percent of gay and bisexual boys and 6 percent of lesbian and bisexual girls.

The researchers said the same results likely would be found in the United States.

In both countries, a "sea change" in cultural acceptance of gays and growing intolerance for bullying occurred during the study years, which partly explains the results, said study co-author Ian Rivers, a psychologist and professor of human development at Brunel University in London.

That includes a government mandate in England that schools work to prevent bullying, and changes in the United States permitting same-sex marriage in several states.

In 2010, syndicated columnist Dan Savage launched the "It Gets Better" video project to encourage bullied gay teens. It was prompted by widely publicized suicides of young gays, and includes videos from politicians and celebrities.

"Bullying tends to decline with age regardless of sexual orientation and gender," and the study confirms that, said co-author Joseph Robinson, a researcher and assistant professor of educational psychology at the University of Illinois in Urbana-Champaign. "In absolute terms, this would suggest that yes, it gets better."

The study appears online Monday in the journal Pediatrics.

Eliza Byard, executive director of the Gay, Lesbian & Straight Education Network, said the results mirror surveys by her anti-bullying advocacy group that show bullying is more common in U.S. middle schools than in high schools.

But the researchers said their results show the situation is more nuanced for young gay men.

In the first years of the study, gay boys and girls were almost twice as likely to be bullied as their straight peers. By the last year, bullying dropped overall and was at about the same level for lesbians and straight girls. But the difference between men got worse by ages 19 and 20, with gay young men almost four times more likely than their straight peers to be bullied.

The mixed results for young gay men may reflect the fact that masculine tendencies in girls and women are more culturally acceptable than femininity in boys and men, Robinson said.

Savage, who was not involved in the study, agreed.

"A lot of the disgust that people feel when you bring up homosexuality ... centers around gay male sexuality," Savage said. "There's more of a comfort level" around gay women, he said.

Kendall Johnson, 21, a junior theater major at the University of Illinois, said he was bullied for being gay in high school, mostly when he brought boyfriends to school dances or football games.

"One year at prom, I had a guy tell us that we were disgusting and he didn't want to see us dancing anymore," Johnson said. A football player and the president of the drama club intervened on his behalf, he recalled.

Johnson hasn't been bullied in college, but he said that's partly because he hangs out with the theater crowd and avoids the fraternity scene. Still, he agreed, that it generally gets better for gays as they mature.

"As you grow older, you become more accepting of yourself," Johnson said.

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Online:

Pediatrics: http://www.pediatrics.org

It Gets Better: http://www.itgetsbetter.org

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AP Medical Writer Lindsey Tanner can be reached at http://www.twitter.com/LindseyTanner

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Bullying study: It does get better for gay teens

CHICAGO (AP) — It really does get better for gay and bisexual teens when it comes to being bullied, although young gay men have it worse than their lesbian peers, according to the first long-term scientific evidence on how the problem changes over time.

The seven-year study involved more than 4,000 teens in England who were questioned yearly through 2010, until they were 19 and 20 years old. At the start, just over half of the 187 gay, lesbian and bisexual teens said they had been bullied; by 2010 that dropped to 9 percent of gay and bisexual boys and 6 percent of lesbian and bisexual girls.

The researchers said the same results likely would be found in the United States.

In both countries, a "sea change" in cultural acceptance of gays and growing intolerance for bullying occurred during the study years, which partly explains the results, said study co-author Ian Rivers, a psychologist and professor of human development at Brunel University in London.

That includes a government mandate in England that schools work to prevent bullying, and changes in the United States permitting same-sex marriage in several states.

In 2010, syndicated columnist Dan Savage launched the "It Gets Better" video project to encourage bullied gay teens. It was prompted by widely publicized suicides of young gays, and includes videos from politicians and celebrities.

"Bullying tends to decline with age regardless of sexual orientation and gender," and the study confirms that, said co-author Joseph Robinson, a researcher and assistant professor of educational psychology at the University of Illinois in Urbana-Champaign. "In absolute terms, this would suggest that yes, it gets better."

The study appears online Monday in the journal Pediatrics.

Eliza Byard, executive director of the Gay, Lesbian & Straight Education Network, said the results mirror surveys by her anti-bullying advocacy group that show bullying is more common in U.S. middle schools than in high schools.

But the researchers said their results show the situation is more nuanced for young gay men.

In the first years of the study, gay boys and girls were almost twice as likely to be bullied as their straight peers. By the last year, bullying dropped overall and was at about the same level for lesbians and straight girls. But the difference between men got worse by ages 19 and 20, with gay young men almost four times more likely than their straight peers to be bullied.

The mixed results for young gay men may reflect the fact that masculine tendencies in girls and women are more culturally acceptable than femininity in boys and men, Robinson said.

Savage, who was not involved in the study, agreed.

"A lot of the disgust that people feel when you bring up homosexuality ... centers around gay male sexuality," Savage said. "There's more of a comfort level" around gay women, he said.

Kendall Johnson, 21, a junior theater major at the University of Illinois, said he was bullied for being gay in high school, mostly when he brought boyfriends to school dances or football games.

"One year at prom, I had a guy tell us that we were disgusting and he didn't want to see us dancing anymore," Johnson said. A football player and the president of the drama club intervened on his behalf, he recalled.

Johnson hasn't been bullied in college, but he said that's partly because he hangs out with the theater crowd and avoids the fraternity scene. Still, he agreed, that it generally gets better for gays as they mature.

"As you grow older, you become more accepting of yourself," Johnson said.

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Online:

Pediatrics: http://www.pediatrics.org

It Gets Better: http://www.itgetsbetter.org

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AP Medical Writer Lindsey Tanner can be reached at http://www.twitter.com/LindseyTanner

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