21
个编辑
更改
跳到导航
跳到搜索
第161行：
第161行： − +
→By study design
An analysis of the 616 RCTs indexed in PubMed during December 2006 found that 78% were parallel-group trials, 16% were crossover, 2% were split-body, 2% were cluster, and 2% were factorial.
An analysis of the 616 RCTs indexed in PubMed during December 2006 found that 78% were parallel-group trials, 16% were crossover, 2% were split-body, 2% were cluster, and 2% were factorial.
对2006年12月在 PubMed 收录的616例随机对照试验的分析发现，78% 为平行组试验，16% 为交叉组试验，2% 为分体组试验，2% 为聚类组试验，2% 为因子组试验。解释性随机对照试验在高度选择参与者和高度控制条件下的研究环境中测试效力。大多数随机对照试验是优势试验，其中一种干预假设在统计学意义上优于另一种干预。
对2006年12月在 PubMed 收录的616例随机对照试验的分析发现，78% 为平行组试验，16% 为交叉组试验，2% 为分体组试验，2% 为聚类组试验，2% 为因子组试验。
To balance group sizes in smaller RCTs, some form of "restricted" randomization is recommended.
To balance group sizes in smaller RCTs, some form of "restricted" randomization is recommended.