Risk of Cardiovascular Events and All-Cause Mortality in Patients Treated With Thiazolidinediones in a Managed-Care Population

Background— This study directly compares risk of acute myocardial infarction (AMI), acute heart failure (AHF), or all-cause death among pioglitazone- and rosiglitazone-treated patients in a managed-care population. Methods and Results— Patients ≥18 years of age, newly initiated on rosiglitazone or pioglitazone between January 1, 2001, and December 12, 2005, were included. The date of the first pharmacy claim for rosiglitazone or pioglitazone was defined as index date. Patients were excluded if they had P =0.666) when patients were followed from index date until end of study period, termination of enrollment status, or diagnosis of AMI/AHF/death. Conclusions— In this retrospective cohort study directly comparing rosiglitazone and pioglitazone with a propensity score–matched population that includes mortality data, no significant differences were found in the risk of AMI, AHF or death.