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(上接本刊第26卷第3期240页)3Ⅱ型方案简介3·1队列研究3·1·1设计模式从性质上讲,此型方案同试验性研究一样,也是前瞻性的,但其论证强度弱于前者。它是一种有假设、无干预的一种前瞻性研究设计。是将一群研究对象按是否暴露于某因素分成暴露组与非暴露组(对照组),随访适当长
(Volume 26, Issue 3, page 240) 3 Introduction to the Type II Program 3.1 Cohort Study 3.1.1 Design Patterns In essence, this type of program is also forward-looking, as is the pilot study The argument is weaker than the former. It is a hypothetical, non-intervention, a prospective study design. Is a group of subjects according to whether a factor is exposed to exposure and non-exposure groups (control group), follow-up appropriate length