One of the best ways scientists have to prove cause and effect in medicine is to conduct a randomized controlled trial, in which study subjects are randomly assigned to two groups.
Study Design: Randomized, controlled trial; Level of evidence, 1.
We are just now writing up the results of a small randomized, controlled trial suggesting there may be large effect sizes with this intervention.
The review found no randomised controlled trials that evaluated the benefits of singing in bronchiectasis.
Methods in this parallel, and controlled trial, quality analysis and clean ability test were carried out between the Yirou beautiful white clean face emulsion and other clean face emulsions in market.
Methods:this was a randomized, double blind controlled trial.
Theirs was a randomized, controlled trial conducted in fourcities.
Randomized controlled trial: 456 eligible subjects have been collected, 343 in Naomaitai capsule group and 113 in hydergine tablet group.
Li KJ. Naoxin capsule for acute stroke: a systematic review of randomized controlled trials.
We included randomised controlled trials, randomised either at the level of the individual or cluster.
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