Treatment effect heterogeneity, stratified by discharge diagnosis supergroup. Treatment effect heterogeneity across risk score ventiles, stratified by Clinical Classification Software (CCS) supergroups based on the principal diagnosis code at discharge. A full listing of the definitions of these supergroups is given in Table S2 in the Appendix S1. Some ventiles are blank for some supergroups, because there were no patients belonging to those supergroups with predicted risks falling within those ranges. Abbreviations: AMI, acute myocardial infarction; CAP, community‐acquired pneumonia; CHF, congestive heart failure; CVD, cerebrovascular disease; GI, gastrointestinal; UTI, urinary tract infection