Table 4

Multiple logistic regression analyses of risks of death or dependency and of neurosurgical admission of 10 days or more after SAH

Outcome	Covariable	aOR (95% CI)	P value
Death or dependency (mRS 3–6): N=347
	Hyponatraemia	0.35 (0.17 to 0.69)	0.003
	Age (years)	1.1 (1.0 to 1.1)	<0.001
	Male	1.1 (0.55 to 2.3)	0.76
	WFNS grade IV–V	33 (14 to 97)	<0.001
	Fisher grade 2–4	5.0 (1.8 to 16)	0.003
	Aneurysm location
	Non-aneurysmal SAH	Reference
	Anterior circulation	3.2 (1.2 to 8.7)	0.019
	Posterior circulation	3.5 (1.0 to 13)	0.050
	Complications	2.9 (1.5 to 6.0)	0.003
	Admission duration (days)	1.0 (0.97 to 1.1)	0.38
Neurosurgical admission of 10 days or more: N=355
	Hyponatraemia	3.2 (1.8 to 5.7)	<0.001
	Age (years)	1.0 (0.99 to 1.0)	0.41
	Male	1.1 (0.64 to 2.0)	0.71
	WFNS grade IV–V	0.61 (0.30 to 1.21)	0.15
	Fisher grade 2–4	(1.73 (0.91 to 3.3)	0.09
	Aneurysm location
	Non-aneurysmal SAH	Reference
	Anterior circulation	5.4 (2.9 to 10.2)	<0.001
	Posterior circulation	7.7 (2.6 to 26.5)	<0.001
	Complications	2.7 (1.5 to 5.0)	<0.001

Complications include a diagnosis of vasospasm, ventriculitis or hydrocephalus.
aOR, adjusted OR; mRS, modified Rankin Scale; SAH, subarachnoid haemorrhage; WFNS, World Federation of Neurosurgical Societies.