搜索结果: 1-1 共查到“实验肿瘤学 colorectal cancer”相关记录1条 . 查询时间(0.015 秒)
The Evaluation of Matching in a Case-Control Study of Colorectal Cancer Using General Practice Lists
Case-control study Confounding Townsend deprivation index
2009/12/14
Background: A crucial part of a case-control study is the selection of a sample of controls that represent the base-population from which cases were drawn. Controls may be matched to cases by one...