Table 1.

Demographics by subgroup

	A1 (n = 100)	A2 (n = 219)	p
Gender (n)
Female	53	119	0.283
Male	47	100	0.326
Age (years)	39.6	39.3	0.895
Comorbidities(n)	10	16	0.384
	B1 (n = 100)	B2 (n = 181)	p
Gender (n)
Female	65	98	0.438
Male	35	83	0.245
Age (years)	39.1	35.9	0.263
Comorbidities(n)	12	16	0.654

A1: residents during the learning curve, A2: residents after the learning curve, B1: consultants during the learning curve, B2: consultants after the learning curve