Hello everyone. I am looking for validated procedures for sample size estimation (of nonrandomized intervention studies) and power analysis (of electronic health record-based studies with limited number of records) for propensity score methods (matching and weighting).
Are there recommended procedures?
I found these two:
However, the first requires information on the C statistic of the model that estimates the propensity scores, which is not usually reported in the studies (should it be reported more often?). The second simplifies the problem to a weighted Mantel-Haenzel test but no practical suggestions are given.