First, it is a retrospective case-control study and is therefore susceptible to reporting bias, meaning that people with ALS may report their coffee consumption differently from controls.
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Kastelein says if he had been in full control of the study, results would have been presented last March.
More than 17 percent of youths ages 12 to 19 were estimated to be obese after a 2003-2006 Centers for Disease Control and Prevention study.
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There are also exaggerated doubts and fears about birth control pills, the study said.
In 2003, the Centers for Disease Control conducted its first study of wireless only homes and found 3% had dropped the landline.
American lawyers are clearly reaping some kind of premium, and the economists behind the Brookings study carefully control for a host of factors including long hours, areas of specialisation, and inherent talent.
The way that the study selected a control group also biases the results, Davis said.
Most are "small, old, and lack advanced pollution control equipment, " the study found.
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The study could not control for whether the individuals were in a situation where they thought they would be in danger.
Earlier this week, FDA staffers recommended that Xarelto should not be marketed without more data, mainly because of questions about the control group in its key study.
The study could not control for whether the individual was the kind of person who thought that someone they know may be planning on trying to shoot them.
The Centers for Disease Control and Prevention released a study this year that found 4 percent of U.S. adults nodded off or fell asleep at least once while driving in the previous month.
The Centers for Disease Control and Prevention released a study this week that found that U.S. adults consumed 11.3% fewer calories in food from fast food restaurants in 2010 than in 2006.
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When hand sanitizers were placed in dorms at the University of Colorado, a study on infection control found that overall illness rate dropped by 20 percent and missed school days by 43 percent.
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"Usually with cereal you don't add a source of saturated fat, while you might add something like sausage to bread, " says Jones, who points out that the study did not control for saturated-fat intake.
Other researchers defend BMI and say the JAMA study's counterintuitive findings are the result of the researchers' inability to control for all diseases and to isolate the study to young, healthy subjects.
China agreed to "actively study" joining the control regime that limits the spread of missiles of more than short range.
Normally, Parkinson's patients use pills to control symptoms, but the university study shows the patch may have advantages -- especially in the long run.
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The study of self-control is being increasingly studied by social psychologists, as they have found it to be as important to achievement as intelligence and grit.
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The study theorizes that entrepreneurs can control their environments in order to play more to their strengths.
Some grow up in safe, nurturing environments, and although they react swiftly to challenges, they have more self-control and calm down quickly, the study says.
At airports with control towers, the FAA needs to study what impact suddenly closing the towers would have on pilots who have gotten used to having them.
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In addition, case-control studies, such as the large INTERHEART study conducted in 52 countries, have provided valuable information.
Castrated rats treated with testosterone had significantly reduced heart damage and near-control stem cell and protein levels, the study found.
Nearly three-quarters of young workers are concerned about their ability to control their spending, according to a new study conducted by Fidelity Investments.
Indeed, the researchers said that "changes in total fat were very small" during the course of the study among the participants in the control group.
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Still, according to a 2002 study from the Centers for Disease Control and Prevention, the leading contraceptive method among women ages 15 to 29 is the pill.
Indeed, when they first circulated over a year ago I, together with virtually every academic that commented on the study, urged Professor Seto to control for law school size.
The success of that study led the Centers for Disease Control and Prevention to launch a similar 16-week program in partnership with the YMCA and UnitedHealth Group.
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The study from the Centers for Disease Control and Prevention found IVF babies suffered from higher rates of conditions such as heart valve defects, cleft lip and palate, and digestive system abnormalities.
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