Cochrane系统评价通常主要依据随机对照试验（random controlled trial，RCT）的结果进行评价，后者被认为是使研究结果免 于偏倚的最佳研究设计方案，即判断治疗效果的“金方案”。
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Random Controlled Clinical Trial 随机对照临床试验
The evidences of EBM are provided by random controlled trial (RCT), and it is not perfect for clinical use.
循证医学遵循的证据来自随机对照试验，这些证据并非完美。
Study Design. A simple blind, random controlled clinical trial.
研究目的：单盲，随机对照临床试验。
Methods The clinical pathway developed in urban hospital was evaluated by non-random concurrent controlled trial and individual depth interview.
方法采用同期非随机对照试验和个人深入访谈法， 对所建立的专科诊疗路径进行评价研究。
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