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Trisha Gao's List: Methodology
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Mar 16, 08
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有很多可以下载的关于如何组织research，需要注意些什么的pdf文档
- Trisha Gao on 2008-03-16
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有很多可以下载的关于如何组织research，需要注意些什么的pdf文档
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- Wow... wonderful! - Trisha Gao on 2008-04-09
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Restriction (observational study)
Restriction is simple and easy to understand and can at least partially eliminate the influence of a confounding factor. We restrict our study population to individuals with certain characteristics by tightening the eligibility criteria. For example, we could include nonsmokers younger than 60 years of age to remove the effect of smoking and older age. Restriction can be used to address a limited number of confounders. This usually involves selecting patients with specific characteristics to have a more homogeneous study population, but this comes at the expense of external validity and loss of generalizability.
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- Trisha Gao on 2008-03-16