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Incidence of shunt dependent hydrocephalus in each treatment modality group according to Fisher grading system
*p values were calculated by χ2-test or Fisher's exact test, †OR and 95% CI were calculated by simple and multiple logistic regressionanalysis. ‡Adjusted for age, Hunt & Hess grade, intraventricular hemorrhage and acute hydrocephalus, §Fisher's exact test. OR : odds ratio, CI : confidence interval
