药物流行病学的实验研究对各种条件的控制比队列研究更严格,尤其是临床试验更是如此。可以把它看成是一种特殊类型的队列研究,因为两者同样需要对研究对象进行随访,以确定结局,不同的是实验研究时,研究者需要采取某种行动(控制或干预) ,即至少对某部分研究对象进行一定的处理,? Experimental studies of pharmacoepidemiology control various conditions more rigorously than cohort studies, especially in clinical trials. It can be thought of as a special type of cohort study, since both also need to follow up the subject to determine the outcome, except that in the case of an experimental study, the researcher needs to take some action (control or intervention) At least some of the research object for some processing?