. Author manuscript; available in PMC: 2020 Nov 17.

Published in final edited form as: J Neurosurg. 2019 May 17;132(6):1836–1844. doi: 10.3171/2019.2.JNS182743

TABLE 4.

Multipredictor model of procedure time in minutes (n = 290)

Predictor	Coefficient	95% CI	p Value
Embolization	29	2 to 56	0.034
Age, yrs
<20	Ref
20–40	2	−33 to 37	0.907
>40	−4	−39 to 30	0.807
Nidus size, cm
<3	Ref
3–6	107	74 to 140	<0.001
>6	225	139 to 311	<0.001
Eloquent area	35	8 to 62	0.011
Venous drainage
Superficial only	Ref
Deep only	40	3 to 76	0.032
Deep & superficial	52	20 to 83	0.002
Diffuse nidus	−9	−41 to 22	0.556
Ruptured	−19	−46 to 8	0.162