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回顾性研究存在着一定的偏倚,有哪些方法可以控制偏倚,提高研究质量?
控制偏倚的方法有很多种,比如研究设计,或者是使用统计策略。比如通过入排标准选定合适的人群,减少选择偏倚;比如严格的测量方法,减少信息偏倚;或者是使用多因素校正混杂偏倚。应当根据每个案例的实际情况进行设计。