Inclusion criteria

Exclusion criteria

RCT, Retrospective studies, prospective cohort studies, national database series, systematic reviews/meta-analysis Study examining TPB with a proportion of patients taking at least one alpha blocker in the perioperative period Data provided on the number of patients taking alpha blockers and those not Data provided on what number of alpha blocker recipients entered AUR and what number of non- alpha blocker recipients entered AUR

Non-English Language Narrative/editorial review only Full text not available/abstract only Methods did not mention the perioperative usage of alpha blockers Reported AUR complication rates did not provide a breakdown on participant usage of alpha blockers