1. Comparator interventions of included studies.

Study	Total number of participants randomized	Intervention 1	Intervention 2	Intervention 3
Ab‐Rahman 2010	40	Propofol/fentanyl	Midazolam/fentanyl	None
Coll‐Vinent 2003	32	Propofol	Etomidate	Midazolam
Dunn 2011	40	Propofol/remifentanyl	Midazolam/fentanyl	None
Godambe 2003	113	Propofol/fentanyl	Ketamine/midazolam	None
Havel 1999	89	Propofol	Midazolam	None
Holger 2005	32	Propofol	Midazolam	None
Miner 2007	214	Propofol	Etomidate	None
Miner 2010	97	Propofol	Ketamine	None
Parlak 2006	70	Propofol/fentanyl	Midazolam/fentanyl	None
Taylor 2005	86	Propofol	Midazolam/fentanyl	None