Packer says this is the first placebo-controlled study in acute heart failure to show a clinical benefit.
Observations, especially observations gathered through controlled study through the scientific method, are data.
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The Symplicity HTN-2 trial is an international, multi-center, prospective, randomized, controlled study of renal denervation in patients with treatment-resistant hypertension.
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It is a randomized controlled study, meaning that similar patients were assigned at random to either get either Centrum or placebo.
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What one of the psychiatrists I spoke to said what they really need to do is show the effects in a controlled study.
He added that this randomised, controlled study should provide clarification.
But a large, NIH-sponsored, carefully controlled study published in the Annals of Internal Medicine Monday reports that, unlike HRT, the supplement doesn't work to help hot flashes or other menopausal symptoms.
This randomized, controlled study showed that Medicaid coverage generated no significant improvements in measured physical health outcomes in the first 2 years, but it did increase use of health care services, raise rates of diabetes detection and management, lower rates of depression, and reduce financial strain.
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The study controlled for factors such as age, race, gender, job level and personality traits.
Some receive Medicaid because they have specific disabilities: which is controlled for in the study.
This study was controlled, taking in account work, prior experience, starting level, industry.
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The study even controlled for age, the emotional expression in the photos and the physical attractiveness of the individuals by obtaining separate ratings of these from other students and using statistical techniques to remove their effects.
Given that the association between diet drinks and with vascular events is unexpected and unsupported by other research, a study that controlled for specific ingredients, such as the type of sweetener and caffeine content, is needed to assess whether there are grounds for a plausible mode of action.
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The ScanBrit randomised, controlled, single-blind study of a gluten- and casein-free dietary intervention for children with autism spectrum disorders.
More than 70 percent of the centers in the study were using electrocardiographically controlled tube current modulation (ECTCM), which is currently the best-known strategy for reducing radiation dose.
Researchers don't yet know how to explain these correlations -- and since the study was not a controlled trial, it's not clear whether marijuana or some other factor in marijuana users' lifestyles actually accounted for the beneficial effects.
Because the Framingham Heart Study is not a randomized controlled trial, it's still not clear if vitamin D is the real reason for the link (the vitamin's levels could drop in unhealthy people for other reasons), or if taking a supplement would lower the risk.
All of the studies ran for at least a year, and all were randomized controlled trials, the most rigorous type of study.
Medical research commonly employs three kinds of study designs: observational studies, randomized controlled trials (RCTs), and metaanalyses.
Unlike the University of Pennsylvania study, Genzyme uses adenovirus in very controlled situations, such as when it is confined to an individual muscle.
Whatever the mechanism, though, this study provides what no previous study ever has: evidence from a controlled experiment that keystone species really exist.
For one, the groups noted the analysis is a retrospective study, not a prospective, randomized controlled clinical trial, which many regard as a gold standard for ferreting out safety concerns.
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This study is actually the first of four placebo-controlled, Phase III trials to be completed.
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Claire Bombardier, the University of Toronto researcher who had conducted Merck's big ulcer study, criticized the new studies for not being placebo-controlled.
The Cambridge group will begin a randomized controlled trial next month with 104 children involved, similar to the peanut study done already, but with controls, said researcher Dr. Andrew Clark of Cambridge University Hospitals.
To further study the reasons behind the findings, the researchers conducted a similar experiment in the controlled environment of a university lab.
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In a recent study (published in the journal Public Library of Science One) seven pairs of subjects controlled virtual avatars.
By contrast, the approach in modern medicine, one that has been validated in hundreds of thousands of controlled experiments, is to rigorously identify, and observe, any factors that may unfairly bias a study.
But there has been only one randomized controlled trial studying the effectiveness of taking foods out of so-called elimination diets, Chafen's study said.
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