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(Stroke. 1996;27:24-29.)
© 1996 American Heart Association, Inc.
Articles |
Vascular Risk Factors and Arteriosclerotic Disease in Idiopathic Normal-Pressure Hydrocephalus of the Elderly
From the Departments of Neurosurgery (J.K.K., J.P.R., J.J.B.) and Neurology (D.W.D., T.M.) and the Institute of Medical Biometry and Medical Informatics (W.V.), Albert-Ludwigs-Universität, Freiburg, and the Department of Neurology (D.W.D.), Medizinische Universität zu Lübeck, Lübeck, Germany.
Correspondence to Joachim K. Krauss, MD, Department of Neurosurgery, Baylor College of Medicine, 6560 Fannin, Suite 944, Houston, TX 77030.
Background and Purpose There is some evidence from previous studies that idiopathic normal-pressure hydrocephalus (NPH) of the elderly might be linked to vascular leukoencephalopathy. The purpose of this study was to examine the prevalence and impact of vascular risk factors and vascular diseases in idiopathic NPH compared with a control cohort.
Methods The prevalence of arterial hypertension; diabetes mellitus; hypercholesterolemia; hyperlipidemia; smoking; obesity; and cardiac, cerebrovascular, and other arteriosclerotic diseases was assessed in 65 patients with idiopathic NPH. The findings were compared with those of 70 patients with comparable age distribution. To describe the differences of the prevalences of vascular risk factors, odds ratios were obtained by univariate and multivariate analyses.
Results The univariate analysis revealed significant associations between idiopathic NPH and arterial hypertension (prevalence, 54 of 65 [83%]; control group, 25 of 70 [36%]; P<.001) and diabetes mellitus (prevalence, 31 of 63 [49%]; control group, 20 of 70 [29%]; P<.015) but not with other vascular risk factors. After multivariate regression analysis, only hypertension remained significantly associated with NPH (P<.0001). There was also a significant association between NPH and cardiac (P<.001), cerebral arteriosclerotic (P=.007), and other arteriosclerotic diseases (P=.001). A positive association was found between the severity of clinical symptoms of NPH and the presence of hypertension, especially for gait disturbance. The presence of hypertension was not related to the duration of NPH.
Conclusions Our data show a highly significant association between idiopathic NPH and arterial hypertension. Arterial hypertension might be involved in the pathophysiological mechanisms promoting idiopathic NPH.
Key Words: arteriosclerosis • elderly • hydrocephalus • hypertension • risk factors
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