The problem with this study is that it applies to a very small universe.
FORBES: Successful Leadership Requires The Right Order Of Operation
Indeed that, to a lesser extent, can be a problem for any study of a human network.
That could be due to a problem with the study, or it could be Zetia didn't work as expected.
Pollin said, a student finds a conceptual problem with a study.
This posed a problem for one study in which doctors gave either Natrecor or a placebo to 237 emergency-room patients and followed them for a month.
There had been a lot of forums and papers published, she says, but the field had been handicapped by a tendency on the part of drug companies to approach the problem on a study-by-study basis, often not following up with communities after the work is done.
People who spent at least four hours per day watching TV, playing video games, or using a computer for fun were more than twice as likely as those who kept their recreational "screen time" under two hours to experience a heart attack, stroke, or other serious cardiovascular problem, the study found.
The problem with the study, Diet Soft Drink Consumption is Associated with an Increased Risk of Vascular Events in the Northern Manhattan Study ( Gardner et al., Journal of General Internal Medicine) is that the numbers are low enough to leave us uncertain as to whether diet drinks were the cause or simply correlated with other factors that led to these events.
FORBES: Will Drinking Diet Soda Increase Your Risk For A Heart Attack?
Second, by including the entire eligible Danish population, which is covered by a national tumor registry, the study avoids the problem of selection bias (that is, people who do not make it into your study for various reasons, including refusal).
FORBES: Do Cell Phones Cause Brain Cancer? The Diehards Cling Desperately To Opinion
But when you study the problem, you realise it's immensely hard to do this.
"The state is overwhelmingly dependent, " says Peter Bragdon, a lawyer who helped the Governor study the problem.
Another problem with the Flegal study is that factors such as smoking and health status influence both body weight and mortality.
FORBES: How Useful Is Body Mass Index In Predicting Long-Term Health?
And even if we were able to settle upon an acceptable definition of consciousness, we really have no idea how to study the problem.
C. bought a database of subprime loans from a company called Loan Performance in order to study the problem more closely, something that, apparently, no other government regulator had thought to do.
He wants to see an immediate reduction in pesticide use until the effects are better understood, and is pressing for the formation of a European Union environment unit to study the problem.
BBC: By BBC News Online's Environment Correspondent Alex Kirby
Everybody knows how Lipitor works, Hazlett argued, so the problem must be the study, which used a technique called carotid intima media thickness (CIMT) to measure the thickness of the walls of an artery in the neck.
And VEGF-Trap seemed to cause fewer bowel perforations, a big problem in the earlier Avastin study.
Instead the study showed the problem came from making copies of the cancer's genetic code.
Three years ago, when UNESCO commissioned the first Education under Attack study, the problem was little known.
Another problem for Glaxo: a study from a rival contradicts one analysis Glaxo is using to defend Avandia.
Fish oil capsules failed to prevent flare-ups of atrial fibrillation, a common heart rhythm problem, in a large study in 2010.
But in other ways, Dr. Scott says his study underestimates the problem.
All the babies in this study had this problem.
CNN: Study: Major benefits for spina bifida surgery in the womb
At a briefing Monday, Assistant Treasury Secretary for Tax Policy Pamela Olson said President George W. Bush has asked the Treasury to study the AMT problem and come up with a permanent fix to be proposed in next year's budget.
"That was actually the predominant problem in patients in our study -- 78 percent of them had health insurance, but many of them were bankrupted anyway because there were gaps in their coverage like co-payments and deductibles and uncovered services, " says Woolhandler.
CNN: Medical bills prompt more than 60 percent of U.S. bankruptcies
To give you an idea of how widespread the problem is, a new study to be published in the Journal of Finance and Quantitative Analysis finds that option volume in a specific stock begins to surge three days before unannounced analyst upgrades or downgrades of a company.
To get around this potential problem, the University of Pennsylvania study only examined studies without a washout period.
The problem, according to a recent study and survey by Jennifer Lawless of American University and Richard Fox of Loyola Marymount University, is that so few choose to run.
The EU study says says the problem of limited capacity is likely to worsen because many busy airports, including London Heathrow and Paris Orly, do not plan to expand.
Walsh says this was the first efficacy data for Raptiva, and so long as the problem in the rheumatoid-arthritis study was effectiveness, not safety, it shouldn't worry investors focused on Raptiva's near-term approval to treat psoriasis.
应用推荐