After all, he notes, the national guidelines were based on results from large randomized clinical trials.
Little of it comes from randomized clinical trials, which are considered the highest level of evidence in medicine.
But then came randomized clinical trials, which concluded that beta carotene failed to protect against either cancer or heart disease.
Dr. Linehan practices dialectical behavior therapy, the only therapy that has been demonstrated to be effective in a number of randomized clinical trials.
Radiation, according to three large randomized clinical trials, reduces the 10-year risk of invasive breast cancer by half, to about 7percentt.
Nevertheless, the research on salt intake can help identify questions to address in randomized clinical trials, the most rigorous kind of medical research.
Randomized clinical trials.
Randomized clinical trials are warranted.
Prospective, retrospective studies and randomized clinical trials.
Randomized clinical trials (RCTs) are costly.
Randomized clinical trials (RCT) increasingly investigate combination therapies.
