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How To Use Propensity Score Analysis - …

How To Use Propensity Score Analysis Lisa Kaltenbach, MS. Department of Biostatistics April 11, 2008. Outline Background/Motivation Propensity Score Estimation Propensity Score Matching Regression Adjustment/Stratification Example Code/ Analysis Conclusions References Motivational Ancedote Two heart surgeons walk into a room. The first surgeon says, Man, I just finished my 100th heart surgery! . The second surgeon replies, Oh yeah, I finished my 100th heart surgery last week. I bet I'm a better surgeon than you. How many of your patients died within 3 months of surgery?

A Balancing Score For a given propensity score, one gets unbiased estimates of average E+ effect. Can include a large number of covariates for PS estimation. Original paper applied PS methodology to observational study comparing CABG to medical

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