Abstract

The objective of the study was to clarify the prevalence of and factors associated with changes in patients' outcomes between discharge and 3months after the onset of aneurysmal subarachnoid hemorrhage (aSAH). Additionally, the World Federation of Neurosurgical Societies (WFNS) and modified WFNS (mWFNS) scales were compared. The data of curatively treated patients with aSAH, collected prospectively in the mWFNS scale study between January 2010 and December 2012, were analyzed retrospectively. The improvement or decline in the modified Rankin Scale (mRS) scores between discharge and 3months after onset was determined. A multivariable logistic regression analysis was performed to identify factors, such as age and WFNS and mWFNS grades, associated with changes in the outcome. The mRS scores improved in 28.3% and declined in 2.5% of the patients. WFNS and mWFNS grades Ⅱ-V on admission were significantly associated with improved mRS scores at 3months after onset. Older age (age: 65-74years vs. age <65years, odds ratio: 6.59, 95% confidence interval: 1.28-34.01; age ≥75years vs. age <65years, odds ratio: 17.67, 95% confidence interval: 2.11-148.26) and WFNS grade III were significantly associated with a decline in mRS scores at 3months after onset. The optimal timing for postdischarge assessment of outcomes may be at 3months after onset, especially in older patients with aSAH. The mWFNS scale is presumed to more accurately assess the outcomes of patients with aSAH than the WFNS scale, as demonstrated in this study.

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