方法结合实例分析空间流行病学中可能存在偏倚与混杂及其对研究结果的可能影响。
I'd like them to be controlled for stressful life events if at all possible (say, a big class of undergrads all taking the same class, though that would have bias of its own).让他们被有压力的生活事件控制，如果可能(是说，一大班的大学生共同上同一堂课，尽管这会带着自身的偏见)。
The authors acknowledged that the study was limited by its retrospective design, possible misclassification, and potential recall bias.作者承认，这项研究受到了的追溯设计，可能的错误分类，和潜在的回忆偏差的限制。
