请问老师，subanalysis 和subgroup analysis有什么区别
请问老师，subanalysis 和subgroup analysis有什么区别？如下面这篇文献 Is Pulse Pressure a Predictor of New-Onset Diabetes in High-Risk Hypertensive Patients? A subanalysis of the Candesartan Antihypertensive Survival Evaluation in Japan (CASE-J) trial 这种数据来自临床试验的观察性研究和一般的观察性研究有何区别？会不会造成偏倚？谢谢！