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Only three of the nine randomized studies reported a survival advantage using thalidomide.

No randomized studies support the widespread use of this regimen in untreated patients.

Several large randomized studies have had similar results.

Statistical inference from randomized studies is also more straightforward than many other situations.

In some cases, such randomized studies are uneconomical or unethical.

They found that women would adhere to a low-fat diet and the formal randomized study began in 1994.

But these claims are based on surgeons' reporting of their own results, rather than randomized studies.

Only in the late 1960's, when the first randomized studies were done, did researchers find that shaving was no more effective than scrubbing.

In contrast, the emerging results of randomized studies are not finding any such effects.

Other recent randomized studies with women who already had heart disease found that estrogen increased the risk of subsequent heart attacks and strokes.

This randomised controlled study began in August 1979, and recruitment continued until June 1986.

This is why you need randomised double blind controlled studies to define the causative agent.

A randomised, controlled study concluded that binaural beat audio could lessen hospital acute pre-operative anxiety.

There are no valid randomised comparative studies of surveillance versus treatment.

A recent large randomised study in India found no such effect but rather an apparent slight excess of deaths in the supplemented group.

No randomised study has ever shown that these negative aspects of childbirth are a result of epidural analgesia.

In two randomised prospective studies, however, no advantage of preoperative radiation therapy could be shown.

This is the only prospective randomised controlled study to date to support the potential benefit of decompressive craniectomy following traumatic brain injury.

These results were evaluated in a prospective, randomised and controlled study.

Lactobacillus supplementation for diarrhoea related to chemotherapy of colorectal cancer: a randomised study.