Table 6.

Factors predictive for embolization related complications by univariate analysis

Parameter	OR	(95%CI)	P
Patient demographics
Male gender	0.60	(0.40–0.92)	0.03
Presenting symptoms
Hemorrhagic	1.50	(0.92–2.44)	0.13
Symptomatic without hemorrhage	0.91	(0.52–1.58)	0.83
Asymptomatic	0.48	(0.22–1.06)	0.09
AVM characteristics
Spetzler-Martin grade
I and II	1.05	(0.67–1.63)	0.93
III and IV	1.07	(0.69–1.66)	0.85
V	0.45	(0.11–1.91)	0.40
AVM size
< 3 cm	1.51	(0.98–2.35)	0.08
3 cm ≤, < 6 cm	0.89	(0.58–1.38)	0.69
6 cm ≤	0.21	(0.05–0.88)	0.03
Eloquent cortex involved	1.22	(0.77–1.94)	0.46
Deep venous drainage	1.59	(1.03–2.46)	0.047
Deep arterial feeders	1.57	(0.85–2.90)	0.20
Concurrent aneurysms	1.67	(1.03–2.71)	0.048
Deep seated location	1.65	(0.75–3.60)	0.31
Treatment
Number of embolization sessions
1	0.93	(0.58–1.49)	0.86
2	0.91	(0.50–1.66)	0.88
3	1.74	(0.85–3.54)	0.18
≥4	0.72	(0.25–2.04)	0.70
Number of pedicles embolized
0 (trial)	0.92	(0.12–7.23)	0.67
1	1.12	(0.70–1.75)	0.74
2	0.64	(0.39–1.03)	0.08
3	0.66	(0.34–1.27)	0.27
≥4	2.60	(1.54–4.41)	0.0005

AVM: arteriovenous malformation, CI: confidence interval, OR: odds ratio.