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Invited Commentary: Propensity Scores

1999/08/15 by M. M. Joffe, Marshall M. Joffe, P. R. Rosenbaum +1 · 32 citations
Mathematics · #Advanced Causal Inference Techniques #Statistical Methods and Inference #Statistical Methods and Bayesian Inference

paper · doi:10.1093/oxfordjournals.aje.a010011

Abstract

The propensity score is the conditional probability of exposure to a treatment given observed covariates. In a cohort study, matching or stratifying treated and control subjects on a single variable, the propensity score, tends to balance all of the observed covariates; however, unlike random assignment of treatments, the propensity score may not also balance unobserved covariates. The authors review the uses and limitations of propensity scores and provide a brief outline of associated statistical theory. They also present a new result of using propensity scores in case-cohort studies.

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