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Table 3: Age at diagnosis: Cox survival analysis^{^a}
Predictor Univariable Multivariable
(n = 550) (n = 550)
HR 95% CI P Value HR 95% CI P Value
AVM nidus size (cm) 1.05 1.00–1.10 .065 1.13 1.07–1.20 <.001
Exclusively deep venous drainage 1.26 0.98–1.63 .077 1.27 0.95–1.69 .110
Venous ectasia 0.83 0.69–0.99 .034 0.75 0.62–0.91 .003
Central location 1.26 1.05–1.52 .014 1.45 1.16–1.81 .001
Lobar location 1.04 0.84–1.30 .716 1.10 0.75–1.61 .622
Posterior fossa location 0.76 0.59–0.98 .037 0.72 0.49–1.06 .099
Aneurysm related to shunt flow 0.59 0.48–0.71 <.001 0.53 0.43–0.65 <.001
↵a These are the results for Cox regression analyses using age at diagnosis as the survival time and stratifying by ethnicity and hemorrhagic presentation. The multivariable model includes all listed predictors.

Predictor	Univariable			Multivariable
	(n = 550)			(n = 550)
	HR	95% CI	P Value	HR	95% CI	P Value
AVM nidus size (cm)	1.05	1.00–1.10	.065	1.13	1.07–1.20	<.001
Exclusively deep venous drainage	1.26	0.98–1.63	.077	1.27	0.95–1.69	.110
Venous ectasia	0.83	0.69–0.99	.034	0.75	0.62–0.91	.003
Central location	1.26	1.05–1.52	.014	1.45	1.16–1.81	.001
Lobar location	1.04	0.84–1.30	.716	1.10	0.75–1.61	.622
Posterior fossa location	0.76	0.59–0.98	.037	0.72	0.49–1.06	.099
Aneurysm related to shunt flow	0.59	0.48–0.71	<.001	0.53	0.43–0.65	<.001