Table 2.

Results of subgroup analysis.

			No. of			Incidence			Subgroup difference
Outcomes	Subgroups	Studies	SBT	NSBT		MD	95%CI		Chi2	P	I2
Theory test	Perioperative anesthesia	8	442	443		6.67	[4.06,9.27]		120.48	<0.01	94%
	Inhalation anesthesia	2	66	66		14.52	[7.53,21.51]		2.17	<0.01	54%
	Regional anesthesia	2	20	20		−2.27	[-5.11,0.58]		0.80	0.12	0%
Skill test	Perioperative anesthesia	6	346	337		7.85	[7.18,8.52]		3.78	<0.01	0%
	Regional anesthesia	2	20	20		4.09	[1.71,6.47]		0.19	<0.01	0%
	Crisis resource management	2	29	29		9.35	[5.40,13.30]		0.05	<0.01	0%

No., number; SBT, simulation based training; NSBT, non-simulation based training, MD: Mean differences, CI: confidence interval.