Impact of Hyperoxia and Hypocapnia on Neurological Outcomes in Patients with Aneurysmal Subarachnoid Hemorrhage: A Retrospective Study

Table 2

Logistic regression analysis for independent predictors for poor neurological outcome.

Parameters	Odds ratio	95% CI	value
APACHE IV score >50	5.403	2.456–11.886	<0.001
Age >55 years old	4.065	1.857–8.898	<0.001
Hyperoxia (PaO2 >200 mmHg within first 24 hours)	3.788	1.131–12.690	0.031
Aneurysm involving posterior circulation	3.685	1.477–9.193	0.005
Presence of ICH/IVH	3.644	1.602–8.292	0.002
Modified Fisher radiological grading >2	3.539	1.465–8.550	0.005
WFNS grading >3	2.937	1.270–6.794	0.012
Underwent intervention radiological procedures	0.382	0.170–0.859	0.020

Hosmer and Lemeshow test χ² = 4.070, df = 8, , Cox and Snell R square 47.4%, Nagelkerke R squared 63.2%, C statistic 0.915 (95% CI 0.879–0.950). Abbreviations: APACHE = Acute Physiology and Chronic Health Evaluation; ICH = intracranial hemorrhage; IVH = intraventricular hemorrhage; WFNS = World Federation of Neurosurgical Society; df = degrees of freedom.