Example 7.36: Propensity score stratification

May 10, 2010

(This article was first published on SAS and R, and kindly contributed to R-bloggers)

In examples 7.34 and 7.35 we described methods using propensity scores to account for possible confounding factors in an observational study.In addition to adjusting for the propensity score in a multiple regression and matching on the propensity score, researchers will often stratify by the propensity score, and carry out analyses within each group defined by these scores. With sufficient

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