Scientists from the UK Childhood Cancer Study, measured radon and gamma rays in the bedrooms and living rooms of 2, 226 children with cancer and 3, 773 healthy children.
The agency's complaint says that some of POM's studies did not show heart disease benefits and that the prostate cancer study wasn't conducted in a standard, scientifically rigorous manner.
While the results of the breast cancer study backed the idea that exercise can improve survival rates or reduce tumour size, more research was needed in this area, she said.
Two-thirds of the terminal-cancer patients in the Coping with Cancer study reported having had no discussion with their doctors about their goals for end-of-life care, despite being, on average, just four months from death.
The researchers from the breast cancer study feel confident that socio-economic factors did not get in the way of their findings: by using local statistics on deprivation, they sought to ensure that the white women they followed were "as deprived" as the black ones.
In another National Cancer Institute study of 2, 000 people at high risk for colon cancer, patients who took very high doses of Celebrex for three years had more than triple the risk of serious heart problems compared with those who got a placebo.
Also in the same issue, the journal is publishing results of the colon cancer prevention study that led Merck (nyse: MRK - news - people ) to withdraw Vioxx last fall.
In another recent cancer prevention study that found no excess heart risk in Celebrex users, patients only took Celebrex once per day, not twice as in the NCI study, potentially reducing any damaging effects to the heart from Cox-2 inhibition.
In particular, the American Cancer Society study finds that women who sit for more than six hours a day were about 40% more likely to die during the course of the study than those who sat fewer than three hours per day.
Now, however, there are data showing some sign of heart risk for every Cox-2 inhibitor ever approved in the U.S. Vioxx doubled the risk of heart attack and stroke in one cancer prevention study, and now the same is true for Celebrex.
BioSante reported that with 2, 869 women enrolled and over 3, 000 women-years of exposure in it LibiGel Phase III cardiovascular and breast cancer safety study, there have been 17 adjudicated cardiovascular (CV) events, with a lower than anticipated event rate of approximately 0.57 percent.
Another study of 35, 000 men, conducted just a few months before that one, showed that taking vitamin E and selenium had no impact on cancer rates, and the researchers actually stopped the study early because there appeared to be a slight increase in cancer and diabetes among study participants.
When the plaintiffs produced a study showing unusually high rates of cancer in the Oriente, Chevron countered with a study of its own, maintaining that cancer rates in the area are actually lower than elsewhere in Ecuador.
Delyth Morgan, chief executive of Breakthrough Breast Cancer, said the study highlighted the need for better tests for breast cancer.
In all, 534 women had a breast cancer recurrence or died from breast cancer during the study period.
It got its start in 1929 when Clarence Cook Little, a Harvard-trained geneticist, developed inbred strains of mice in order to study cancer.
Having any allergy was associated with a 59% reduced risk of any type of head and neck cancer, the study found.
Very few participants developed esophageal or stomach cancer during the study.
Weight gain of 25 to 35 pounds is normal in pregnancy and not associated with an increase in risk for either premenopausal or postmenopausal breast cancer, the study found.
He has pioneered the use of technology to study cancer-associated genes and to construct animal models of many human cancer types, including cancers of the lung, pancreas, brain, and ovaries.
WHITEHOUSE: President Obama Announces More Key Administration Posts
Dr Harpal Kumar, chief executive of Cancer Research UK, said leading a healthy lifestyle did not guarantee a person would not get cancer but the study showed "we can significantly stack the odds in our favour".
"Given this new data, " Kim said, "it is not clear that the cardiovascular risk seen in Approve makes Vioxx unique in the class of similar drugs marketed in the U.S." Approve is the cancer-prevention study that turned up the heart risk for Vioxx.
Its Oxford unit is leading a study of prostate cancer and diet as part of a European study called EPIC.
They will also study oral cancer and birth defects such as cleft lip and cleft palate.
But Avastin failed to help breast cancer patients in a study of 462 women completed last fall.
Ninety-three patients who took Vytorin in the study developed cancer, compared to 65 on placebo, a statistically significant difference.
Professor Harry Bartelink, from the European Organisation for Research and Treatment of Cancer who led the study, said the results were unambiguous.
It's not clear from this study whether cancer risk is truly affected by lack of sleep, says Rapoport, but it is certainly a possibility.
The Lancet study compared cancer rates over a five-year period in 50, 000 people from several countries, some taking a folic acid supplement and some a placebo.
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