Consistency of Clinical Diagnosis of Dementia in NEDICES: A Population-Based Longitudinal Study in Spain

Journal of Geriatric Psychiatry and Neurology - Tập 22 Số 4 - Trang 246-255 - 2009
Félix Bermejo‐Pareja1, Julián Benito‐León2, Saturio Vega3, Javier Olazarán4, María de Toledo5, Jaime Díaz‐Guzmán6, Fernando Sánchez‐Sánchez6, José Manuel Morales‐González7, Rocío Trincado6, A. Portera‐Sánchez6, Gustavo C. Román8
1Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED) Spain, Department of Neurology University Hospital "12 de Octubre," Madrid, Spain
2Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Spain
3Arévalo Health Center, Arévalo, Avila, Spain
4Department of Neurology, University Hospital "Gregorio Marañón," Madrid, Spain
5Department of Neurology, Hospital Severo Ochoa, Leganés, Madrid, Spain
6Department of Neurology, University Hospital “12 de Octubre”,Madrid, Spain
7Department of Research, Ministry of Labor and Social Affairs, Madrid, Spain
8Department of Medicine/Neurology, University of Texas Health Science Center at San Antonio, San Antonio, Texas

Tóm tắt

Background: Few longitudinal studies have verified the clinical diagnosis of dementia based on clinical examinations. We evaluated the consistency of the clinical diagnosis of dementia over a period of 3 years of follow-up in a population-based, cohort study of older people in central Spain. Methods: Individuals (N = 5278) were evaluated at baseline (1994-1995) and at follow-up (1997-1998). The evaluation included a screening questionnaire for dementia and a neurological assessment. Results: Dementia screening consisted of a 37-item version of the Mini-Mental State Examination (MMSE) and the Pfeffer Functional Activities Questionnaire (FAQ). Study neurologists investigated those participants who screened positively (N = 713) as well as 843 who had screened negatively to test the sensitivity of the screening instruments or because they had a positive screening for other chronic neurological diseases. We detected 295 patients among those who screened positive and 13 among those who screened negatively. Three years follow-up evaluation demonstrated 14 diagnostic errors at baseline (4.5%) leading to a final number of 306 patients with dementia. The corrected prevalence of dementia was 5.8% (95% confidence interval [CI] 5.2-6.5). Conclusions: The diagnosis of dementia was highly accurate in this population-based, Spanish cohort study, and our prevalence figures agree with other European surveys. Given the high cost and difficulties of population rescreening and its relatively low yield, we conclude that a single 2-phase investigation (screening followed by clinical examination) provides accurate information for most population-based prevalence studies of dementia.

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Journal of Geriatric Psychiatry and Neurology

Tập 22 Số 4

246-255

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