Permutation Tests for Matched Pairs with Adjustments for Covariates

Paul R. Rosenbaum

Journal of the Royal Statistical Society Series C, 1988, vol. 37, issue 3, 401-411

Abstract: In observational studies, treated and control subjects are often matched on the basis of observed covariates to permit comparisons of subjects who appeared similar before treatment. In many studies, however, it is not possible to find an exact match for every treated subject, so that within matched pairs treated and control subjects may still differ with respect to some observed covariates. This paper discusses a simple general method for obtaining permutation inferences that adjust for such observed differences within pairs. The method generalizes both the Wilcoxon signed rank test for continuous responses and the McNemar‐Cox test for binary responses, as well as many other permutation tests for matched paris.

Date: 1988
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