TABLE 2.

Adjusted odds ratios of outcomes according to consecutive series of procedures.

Outcomes	Surgical experience	N	Events, n (%)	Adjusted OR (95% CI)a	P
Major complications	Group 1	40	4 (10.0)	Ref	Ref
	Group 2	40	3 (7.5)	0.755 (0.150–3.797)	0.734
	Group 3	137	4 (2.9)	0.256 (0.057–1.158)	0.077
P for trend				0.063
Discharge mRS score >2	Group 1	40	3 (7.5)	Ref	Ref
	Group 2	40	1 (2.5)	0.263 (0.024–2.924)	0.277
	Group 3	137	1 (0.7)	0.064 (0.005–0.813)	0.034
P for trend				0.030

mRS, modified Rankin Scale; OR, odds ratio.

^aAdjusted for age, sex, operator, giant aneurysm, and posterior circulation aneurysm.