Evaluating the Impact of Early Versus Delayed 5 Alpha Reductase Inhibitor Treatment on the Risk of Emergent Surgery in Men With Benign Prostatic Hyperplasia

Inclusion Criteria: * Male * aged 50 years or older * diagnostic claim for BPH * prescription claim for an AB and a 5ARI in the observation period (5ARI must occur within a 6-month window after the AB). * continuously eligible for 6 months prior to and 12 months after index prescription date Exclusion Criteria: * prostate or bladder cancer during the study period * any prostate-related surgical procedure within 5 months of the index prescription date * prescription claim for finasteride 1 mg for male pattern baldness during the study period * 5ARI therapy prior to initiation of AB therapy