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.
证明药理和药效的最好方法之一就是进行随机临床对照试验，在这个试验中其研究对象会被随机地分成两组。
METHODS: a randomized controlled trial was adopted.
方法：采用随机对照试验。
Women at risk of premature delivery were assessed for entry into a randomized controlled trial of repeated courses of corticosteroids (ACTORDS).
将有早产倾向的妇女纳入重复类固醇激素疗程的随机对照组。
Future studies should include a randomized controlled trial of exercise training that can reveal its direct effects on NAFLD histopathology, they suggest.
他们建议，未来的研究应该包括运动练习的随机对照试验，以展示它对NAFLD组织病理学的直接作用。
The researchers are planning a randomized, controlled trial comparing duloxetine to placebo.
研究人员正计划通过一项随机对照实验将度洛西丁与安慰剂进行对比。
Study Design. A randomized controlled trial.
研究设计：随机对照试验。
A randomized controlled trial of preventive antibiotics used for esophageal operations.
食管手术预防性抗生素使用的随机对照研究。
Study Design. A randomized controlled trial with multivariable analyses of prognostic factors.
研究设计：预后因素多变量分析的随机对照试验。
A Randomized, Controlled Trial of Total Knee Replacement.
全膝关节置换术的随机对照试验。
A Randomized, Controlled Trial of Total Knee Replacement.
全膝关节置换术的随机对照试验。
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