Fig. 5

MSE of estimated log(OR) by PSM-based approach and heterogeneity (left: low; middle: moderate; right: high) when 50% treatment prevalence and the true pooled OR =3
MSE of estimated log(OR) by PSM-based approach and heterogeneity (left: low; middle: moderate; right: high) when 50% treatment prevalence and the true pooled OR =3