“…Standard specification tests for the logit models can be used to assess treatment‐control balance, such as examining standardized covariate differences
41 . The Shaikh et al test
42 adapted to IPW settings
24 is also useful for assessing the overlap between
and
for
, where
and
are empirical densities of the estimated propensity scores for the two samples, and
is the population size ratio that can be estimated using sample counts. Confidence in the results can also be increased if measures of association between actual and predicted
values are high (relative to random allocations).…”