Only 6 (8%) RCTs had adequate allocation concealment, with 5 RCTs using sealed opaque envelopes and 1 RCT using centralized computer allocation.
英
美
- 仅有6篇(8.;11%25)分配方案隐藏充分,其中5篇采用密封不透光的信封,1篇采用中心随机分组;