Table 1.

Characteristics of five articles included for meta-analysis that reported randomized controlled trials of etomidate induced general anaesthesia with or without use of midazolam.

Publication detail	Study Country	Study participants, n	Time between midazolam and anaesthesia induction, s	Treatment group	Surgical setting	Jadad score
Patel et al. 20159	India	60	60	Midazolam 0.05 mg/kg (n = 30)	elective surgery	3
				Normal Saline 10 ml (n = 30)
Aktolga et al. 201010	India	102	90	Midazolam 0.05 mg/kg (n = 51)	elective surgery	4
				Normal Saline (n = 51)
Hwang et al. 200811	Korea	60	60	Midazolam 0.05 mg/kg (n = 30)	elective surgery	6
				Normal Saline (n = 30)
Huter et al. 200712	Germany	40	90	Midazolam 0.015 mg/kg (n = 20)	cardiac surgery	4
				Normal saline (n = 20)
Schwarzkopf et al. 200313	Germany	40	90	Midazolam 0.015 mg/kg (n = 20)	elective gynaecological, ophthalmologic or urological surgery.	4
				Normal saline (n = 20)