随机对照试验Randomized Control Trials,RCT)是最可靠的临床疗效评价方法。这种研究按照正规的随机化方法将研究对象进行分组,使每一个研究对象都有同等的机会进入试验组或对照组,然后给试验组对象以所考核的治疗措施(干预),对照组则不给予,比较2组结果的差别,得出结论。由于2组试验是同时开始,同时结束,故又称平行对照试验。由于随机对照试验消除了分组时可能存在的偏倚,使影响结果的各种 Randomized Control Trials, RCT) is the most reliable method of clinical efficacy evaluation. This study grouped the subjects according to a formal randomisation approach so that each subject had equal access to the experimental or control group and then to the subjects in the study group for the treatment measures assessed (intervention), while those in the control group Not given, the difference between the two groups of results, draw conclusions. As two sets of tests are started at the same time, at the same time, it is also called parallel control test. Because randomized controlled trials eliminate possible bias in grouping, making the effects of various