Study	Reason for exclusion
Jones 2000	Retropective cohort study comparing pre‐admission clerking of urology participants by experienced and inexperienced pre‐registration house officers and nurse specialists. Outcomes: tests ordered, cancellation by participant and postoperative complications
Koay 1996	Descriptive study of nurse‐led POA clinic for ear, nurse and throat (ENT) surgery
Reed 1997	Observational study comparing participants seen at a nurse‐led pre‐operative assessment clinic with participants not seen at a clinic before surgical admission. Outcomes: participant satisfaction, cancellations
Stables 2004	Randomized controlled trial of nurse practitioner versus junior medical staff preparation for cardiac catheterization
Vaghadia 1999	Observational cohort comparing nurse and anaesthetist assessments for day surgery
van Klei 2004	OPEN study. Diagnostic test accuracy study in 4540 adult surgical participants assessed by nurse and then anaesthetist, with anaesthetist as reference standard. Primary outcomes: is participant ready for surgery with no additional work‐up? Secondary outcomes: ASA classification and time taken to read medical record
Varughese 2006	Time‐series analysis of pre‐admission clinic from baseline (assessment by anaesthetist only) during 12 months when nurse practitioners took over much of assessment. Outcomes: respiratory complications, participant preoperative preparation time, participant satisfaction, nurse satisfaction
Vickers 1983	Review/educational article. No data presented
Whiteley 1997	Diagnostic test accuracy with participants seen by nurse specialist and then by preregistration house officer. Records compared after surgery by surgeon and accuracy/completeness determined. Outcomes: completeness of history and examination; tests ordered; ASA classification