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This approach ignores observed discrepancies in matched sets that may be consequential for the distribution of treatment, which are succinctly captured by within-set differences in the propensity score. We address this problem via covariate-adaptive randomization inference, which modifies the permutation probabilities to vary with estimated propensity score discrepancies and avoids requirements to exclude matched pairs or model an outcome variable. We show that the test achieves type I error control arbitrarily close to the nominal level when large samples are available for propensity score estimation. We characterize the large-sample behaviour of the new randomization test for a difference-in-means estimator of a constant additive effect. We also show that existing methods of sensitivity analysis generalize effectively to covariate-adaptive randomization inference. Finally, we evaluate the empirical value of combining matching and covariate-adaptive randomization procedures using simulations and analyses of genetic damage among welders and right-heart catheterization in surgical patients.<\/jats:p>","DOI":"10.1093\/jrsssb\/qkae033","type":"journal-article","created":{"date-parts":[[2024,4,9]],"date-time":"2024-04-09T20:15:08Z","timestamp":1712693708000},"page":"1312-1338","source":"Crossref","is-referenced-by-count":8,"title":["Covariate-adaptive randomization inference in matched designs"],"prefix":"10.1093","volume":"86","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0409-6586","authenticated-orcid":false,"given":"Samuel D","family":"Pimentel","sequence":"first","affiliation":[{"name":"Department of Statistics, University of California , Berkeley, 367 Evans Hall, Berkeley, CA 94720 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