• Takao Sasaki, Masato Naraoka, Norihito Shimamura, Atsuto Takemura, Seiko Hasegawa, Kennichi Akasaka, and Hiroki Ohkuma.
• Department of Neurosurgery, Hirosaki University, Hirosaki, Aomori, Japan. Electronic address: sasakisasaki@hirosaki-u.ac.jp.
• World Neurosurg. 2024 May 1; 185: e516e522e516-e522.

ObjectivePoor-grade subarachnoid hemorrhage (SAH) accounts for 20% of all SAH and is associated with poor outcomes. The first step in improving outcomes is to analyze the factors that contribute to poor outcomes.MethodsThis was a multicenter, retrospective, observational, cohort study. Data fields included demographic, clinical, radiological, and outcome data for all spontaneous patients with SAH treated at 4 hospitals in Aomori Prefecture in Japan. Patients with modified Rankin Scale score 0-2 at discharge were defined as the good outcome group, and those with modified Rankin Scale score 3-6 were defined as the poor outcome group, and comparisons were made between the 2 groups.ResultsThere were 329 eligible patients with poor-grade SAH, 41 with good outcome group, and 288 with poor outcome group. On multivariate analysis of the outcome, conservative treatment (P < 0.001), Fisher group 4 (P < 0.007), age ≥65 years (P = 0.011), and Hunt and Kosnik grade V on admission (P = 0.021) were significant factors contributing to a poor outcome.ConclusionsNonelderly patients who are not in grade V and Fisher group 4 should undergo aneurysm treatment as soon as possible because they are more likely to have a good outcome, whereas elderly patients in grade V and Fisher group 4 are unlikely to benefit from aneurysm treatment at present. The development of a treatment for early brain injury may be important to improve the outcomes of patients with poor-grade SAH.Copyright © 2024 Elsevier Inc. All rights reserved.

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