Journal of Korean Society of Geriatric Neurosurgery 2016;12(1):55-62.
Published online June 30, 2016.
The Influence of the Body Mass Index on Short-term Outcome After Aneurysmal Subarachnoid Hemorrhage in the Aged
Ho Seok Choi , Cheol Wan Park , Eun Young Kim , Chan Jong Yoo , Young Bo Kim , Woo Kyung Kim
Department of Neurosurgery, Gil Medical Center, Gachon University School of Medicine, Incheon, Korea
The purpose of this study was to investigate the influence of body mass index (BMI) on the short-term outcome following treatment for aneurysmal subarachnoid hemorrhage (aSAH) in the aged (60 years and older).
The authors analyzed 111 consecutive aSAH patients of 60 years and older. BMI was determined and grouped according to the World Health Organization (WHO) criteria. Clinical outcome was determined according to the Glasgow Outcome Scale (GOS) score at hospital discharge and categorized as “good” or “poor”. Statistical analysis was performed using SPSS software version 19.0 (SPSS Inc., Chicago, IL, USA), chi-square test, t-test, one-way ANOVA, and logistic regression analysis.
Based upon the WHO definition of BMI, 14 patients (12.6%) were overweight and 3 (2.7%) were obese. Of the overweight patients, 8 (57.1%) achieved a good outcome (“good” and “fair” GOS score). Of the 80 patients with a normal BMI, 52 (65%) achieved a good outcome (p=0.322). Multivariate analysis indicated that hypertension history (odds ratio [OR]: 4.232, 95% confidence interval [CI]: 1.151-15.568, p=0.030), alcoholism(OR: 0.136, 95% CI: 0.023-0.814, p=0.029), initial Hunt-Hess grade (OR: 0.453, 95% CI: 1.226-5.480, p=0.013), and treatment modality (conservative management; OR: 5.632, 95% CI: 1.029-30.807, p=0.046) were independent prognostic variables in treatment outcome at discharge from hospital.
Although many neurosurgeons expect a worse outcome for obese or higher BMI patients, this study found that the BMI in the aged was not an independent prognostic factor for short-term treatment outcome after aSAH in the multivariate regression analysis.
Key Words: Body mass indexㆍOld ageㆍObesityㆍAneurysmal subarachnoid hemorrhageㆍPrognosis

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