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Background and purpose: The outcomes of subarachnoid hemorrhage (SAH) in aged patients are more severe than those in non-aged patients. There are few reports about the relationship between the age and the effect of perioperative care for SAH patients. We performed a nationwide survey in Japan to determine the relationship between perioperative care and SAH outcomes in aged and non-aged patients.Methods: We analyzed 17,343 subarachnoid hemorrhage (SAH) patients treated with clipping or coiling in 579 hospitals who participated in the J-ASPECT study. Data between 2010 and 2013 were obtained from the Japanese Diagnosis Procedure Combination Database. We stratified patients into two groups according to their age (aged group >75 y.o., n=3885; non-aged group < 75 y.o., n=13,458) and analyzed the association between perioperative care and poor outcome (modified Rankin Scale score 3-6 at the time of discharge). With respect to perioperative care, we evaluated time from onset to surgery (days), treatment (clipping or coiling), and drugs delivered after surgery (fasudil hydrochloride, ozagrel sodium, cilostazol, statin, EPA, edaravone).Results: In the non-aged group, coiling (OR=0.84; P<0.01) and treatment with fasudil hydrochloride (OR=0.59; P<0.01), statin (OR=0.83; P<0.01), and EPA (OR=0.83; P<0.01) significantly improved the outcomes and cilostazol treatment tended to improve the outcomes (OR=0.91; P=0.07). In both groups, edaravone treatment was associated with poor outcome (aged group: OR=2.34, P<0.01; non-aged group: OR=2.33, P<0.01). Although no factor that could improve outcome in the aged group was identified, JCS scores less than 30, coiling (OR=0.80; P=0.03), and EPA treatment (OR=0.74; P=0.02) were statistically significant prognosis improvement factors.Conclusion: Coiling and treatment with fasudil hydrochloride, statins, and EPA improved outcomes of non-aged patients. Although perioperative care did not improve the outcome of aged SAH patients, in cases of relatively mild SAH, perioperative care had the potential to improve the outcome.