【交流】standardized mean difference (SMD) 与mean difference (MD)的区别
最近学习循证医学看到这样一句话,“whether trials all report the outcome using the same scale (when the mean difference can be used) or using different scales (when the standardized mean difference has to be used).” ,请教一下诸位该如何理解和应用?是否意味着纳入研究如果使用不一样的量表也是可以通过SMD进行合并?