Preoperative Prediction of Outcome in 283 Poor-Grade Patients with Subarachnoid Hemorrhage: A Project of the Chugoku-Shikoku Division of the Japan Neurosurgical SocietyShirao S.a · Yoneda H.a · Kunitsugu I.b · Ishihara H.a · Koizumi H.a · Suehiro E.a · Nomura S.a · Kato S.a · Fujisawa H.a · Suzuki M.a
Departments of aNeurosurgery and Clinical Neuroscience, and bPublic Health, Yamaguchi University School of Medicine, Ube, Japan
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Article / Publication Details
Background: The management of patients with poor-grade subarachnoid hemorrhage (SAH) continues to be controversial. The objective of this study was to examine predictors of outcome of poor-grade SAH after surgical obliteration of the aneurysm. Methods: The study was performed as a retrospective review of 283 patients with poor-grade SAH who underwent surgical obliteration of the aneurysm at multiple centers in Chugoku and Shikoku, Japan. Results: A favorable outcome at discharge was achieved in 97 of the 283 patients (34.3%). Age (p < 0.001), World Federation of Neurosurgical Societies (WFNS) grade V at admission (p = 0.002), improvement in WFNS grade after admission (p = 0.002), Fisher grade (p = 0.039) and a low-density area (LDA) associated with vasospasm on computed tomography (CT; p < 0.001) showed a significant association with outcome. Further analysis of WFNS grades indicated that most patients who only improved to preoperative grade IV from grade V at admission did not have a favorable outcome. Multivariate analysis identified age (especially of ≧65 years; p < 0.001), WFNS grade V (p < 0.001) and LDA associated with vasospasm on CT (p < 0.001) as predictors of a poor outcome, and improvement in WFNS grade (p = 0.001) as a predictor of a favorable outcome after surgical obliteration of the aneurysm. Conclusions: Advanced age, WFNS grade V, improvement in WFNS grade, and LDA associated with vasospasm on CT were found to be independent predictors of clinical outcome, whereas rebleeding, early aneurysm surgery and treatment modality (surgical clipping or Guglielmi detachable coil embolization) were not independently associated with outcome in patients with poor-grade aneurysm.
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