There's also no proof from randomized trials that more frequent treatment saves lives or prevents hospitalizations.
But more recent randomized trials have failed to show a hint of this benefit.
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But larger, randomized trials open to the larger community hadn't been done, for logistical and cost reasons.
Both are randomized trials to test the effectiveness of Avastin against Lucentis in treating people with wet AMD.
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Both projects were rigorous randomized trials, comparing kids who got pre-K benefits with a control group that didn't.
Randomized trials are not always feasible and, in some situations, may be unethical.
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Despite their findings, Buijsse and his colleagues caution that more research, namely randomized trials on the heart benefits of chocolate, is needed.
In one study, researchers analyzed patient data from 51 randomized trials that were designed to observe aspirin's ability to prevent vascular events such as heart attacks.
Controlled, randomized trials will help validate these promising starts.
Few studies have compared exercise to drug treatment, but two randomized trials have shown that vigorous exercise combined with cognitive treatment is just as good as spinal fusion surgery, with fewer complications.
It was gradually replaced by lumpectomy and whole-breast irradiation after several long-term, randomized trials showed this treatment was as effective as removing the entire breast in preventing cancer recurrence and prolonging survival.
Analyzing the data from 51 randomized trials, the authors found that aspirin reduced death from cancer by 15 percent and that the benefit increased over time, rising to 37 percent after five years.
Karlan, Appel, Duflo and Banerjee tackle that question through randomized control trials (RCTs).
Medical research commonly employs three kinds of study designs: observational studies, randomized controlled trials (RCTs), and metaanalyses.
Stewart has submitted proposals for six randomized clinical trials but has yet to win funding from the government or InSightec.
Twenty-one of the studies included in the review were randomized controlled trials, which are considered the gold standard for scientific research.
All of the studies ran for at least a year, and all were randomized controlled trials, the most rigorous type of study.
The Komen Web site cites a meta-analysis of the the two largest randomized controlled trials, one from China and one from Russia.
Randomized clinical trials should be designed to confirm whether cherry products could provide a dietary or non-medication based alternative to prevent gout attacks.
Two randomized controlled trials in England and the Netherlands have shown that supplementing the diets of young prisoners with omega-3 reduced serious offending by 35%.
But the AHA fails to note that there have been no big randomized clinical trials with hard outcomes that show the benefit of their diet.
Proponents and skeptics alike agree on the need for data from randomized controlled trials to provide better information to guide use of the new procedure.
There have not been any large randomized controlled trials regarding coffee's health benefits, or even to see whether caffeinated or decaf is better for you.
We know from dozens of randomized controlled trials that medications ranging from stimulants to antipsychotics to mood stabilizers are surprisingly effective in reducing aggression in children and adolescents.
But Straube admits that the Medicare decision on epoetin dosing is based on clinical habits and industry-promoted guidelines, not on the results of randomized clinical trials.
We have a set of plausible and interesting hypotheses to work with, and now we need some randomized controlled trials to give us data we can really use.
While high-end evaluation methods like randomized control trials (RCTs) are the surest means of determining what interventions in fact cause certain outcomes, they are also time-consuming and costly and beyond the means of many, if not most, mainstream nonprofits.
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These are the gold standard randomized control trials or intervention studies, in which a control group consuming soda is monitored for weight gain over time against a group which stops drinking soda (and all other dietary and lifestyle factors are controlled for).
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Several studies that followed large groups of people as they aged have suggested that a diet rich in fish is linked to a reduced risk of dementia and mental decline, but most randomized controlled trials comparing DHA supplements with placebo have found no benefit.
Despite a number of randomized clinical trials suggesting that EMDR is at least as effective as other commonly accepted therapies for traumatic disorders (i.e. such as post-traumatic stress disorder), it still viewed as a bit of a fringe procedure by many in the mental health field.
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