Prevalence of Idiopathic Normal-Pressure Hydrocephalus in the Elderly Population of a Japanese Rural Community
Open Access
- 1 January 2008
- journal article
- Published by Japan Neurosurgical Society in Neurologia medico-chirurgica
- Vol. 48 (5), 197-200
- https://doi.org/10.2176/nmc.48.197
Abstract
The prevalence of idiopathic normal-pressure hydrocephalus (NPH) in a community was investigated by retrospective analysis of data from a previous community-based study of 170 randomly selected elderly residents aged 65 years or older. Magnetic resonance (MR) images of the subjects were reviewed for the specific structural features of idiopathic NPH, i.e. ventricular enlargement and narrow cerebrospinal fluid (CSF) space at high convexity and high midline areas. The clinical features of idiopathic NPH, gait disturbance, urinary incontinence, and cognitive impairment, were evaluated on the basis of records of the subjects’ neurological examinations, a health questionnaire, the Mini-Mental State Examination, and Clinical Dementia Rating. Thirteen of the 170 subjects showed lateral ventricular enlargement greater than 0.3 on Evans’ index. Five subjects (2.9%) demonstrated both ventricular enlargement and narrow CSF space at the high convexity/midline. All five subjects with these MR imaging signs had cognitive impairment, one had gait disturbance, and one had urinary incontinence. The present study found 2.9% of community-dwelling elderly subjects showed radiological and clinical features consistent with idiopathic NPH.Keywords
This publication has 11 references indexed in Scilit:
- Management of idiopathic normal-pressure hydrocephalus: a multi-institutional study conducted in JapanJournal of Neurosurgery, 2001
- Prevalence of senile dementia in a rural community in Japan: the Tajiri projectArchives of Gerontology and Geriatrics, 1999
- Idiopathic normal-pressure hydrocephalus in adults: Result of shunting correlated with clinical findings in 18 patients and review of the literatureNeurosurgical Review, 1997
- Vascular Risk Factors and Arteriosclerotic Disease in Idiopathic Normal-Pressure Hydrocephalus of the ElderlyStroke, 1996
- Starnberg Trial on Epidemiology of Parkinsonism and Hypertension in the ElderlyArchives of Neurology, 1995
- Shunting normal‐pressure hydrocephalus: Do the benefits outweigh the risks?Neurology, 1992
- A New Clinical Scale for the Staging of DementiaThe British Journal of Psychiatry, 1982
- “Mini-mental state”: A practical method for grading the cognitive state of patients for the clinicianJournal of Psychiatric Research, 1975
- The special clinical problem of symptomatic hydrocephalus with normal cerebrospinal fluid pressure: Observations on cerebrospinal fluid hydrodynamicsJournal of the Neurological Sciences, 1965
- Symptomatic Occult Hydrocephalus with Normal Cerebrospinal-Fluid PressureThe New England Journal of Medicine, 1965