Characteristics of excluded studies [ordered by study ID]

Study	Reason for exclusion
Blery 1986	Observational study of selective preoperative testing for any surgery requiring general or regional anesthesia; no control group
Brown 2001	Comment and summary of Dr Schein’s study
Bruns 2001	Review of lab testing in outcome studies
Coleman 2002	Editorial on applying results of trials to practice
Dessy 2017	Intervention does not meet eligibility criteria: abstract compares onsite same-day mandatory pre-admission testing to offsite pre-admission testing
Francis 1996	Comment on report of local vs general anesthesia for cataract surgery
Gao 2006	Retrospective review of age-related cataract patients with cardiovascular disease
Gibson 2000	Comment and summary of Dr Schein’s study
Gimbel 2000	Review of cataract surgery at the Gimbel Eye Surgical Centre in Alberta, Canada
Imasogie 2003	Not a randomized trial; 4 months pre- and 4 months post-discontinuation of routine testing
Johnson 1988	Observational study of routine preoperative testing for ambulatory surgery patients; no control group
Lira 2002	Retrospective case-control study to identify factors associated with cancelling cataract surgery; cases were cataract patients whose surgeries were canceled due to medical events, while controls were patients who underwent surgery
Macpherson 1993	Review of pre-surgical tests commonly used for general surgeries
Maltzman 1981	Retrospective review of results from pre-admission evaluations in a cohort that underwent cataract extraction
NCT02903485	Randomized clinical trial comparing pre-surgical assessment and surveillance during cataract surgery performed by nurses versus anesthetists
Smithen 2003	Comment and summary of Reeves 2003 cohort analysis of Dr Schein’s study
Tallo 2007	Retrospective review of cataract patients in Brazil, 2004
Walters 1997	Study of whether or not doctors involved in peribulbar local anaesthetic surgery reviewed results of preoperative tests for patients