Restriction as a method for reducing bia
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Marshall M. Joffe; Graham A. Colditz
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Article
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1998
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John Wiley and Sons
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English
⚖ 192 KB
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The direct effect of a treatment on some outcome is that part of the treatment's effect not referred through a specified covariate intermediate on the pathway between treatment and outcome. Such direct effects are often of primary interest in a data analysis. Unfortunately, standard methods of analy