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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Glymour, M. Maria Singh-manoux, Archana Berr, Claudine Elbaz, Alexis Dugravot, Aline Kivimaki, Mika Ebmeier, Klaus P. Ferrie, Jane E. |
| Spatial Coverage | London |
| Description | Author Affiliation: Singh-Manoux A ( Institut National de la Santé et de la Recherche Médicale, U1018, Centre for Research in Epidemiology and Population Health, Hôpital Paul Brousse, 94807 Villejuif Cedex, France.); |
| Abstract | Objectives To estimate 10 year decline in cognitive function from longitudinal data in a middle aged cohort and to examine whether age cohorts can be compared with cross sectional data to infer the effect of age on cognitive decline. Design Prospective cohort study. At study inception in 1985-8, there were 10 308 participants, representing a recruitment rate of 73%. Setting Civil service departments in London, United Kingdom. Participants 5198 men and 2192 women, aged 45-70 at the beginning of cognitive testing in 1997-9. Main outcome measure Tests of memory, reasoning, vocabulary, and phonemic and semantic fluency, assessed three times over 10 years. Results All cognitive scores, except vocabulary, declined in all five age categories (age 45-49, 50-54, 55-59, 60-64, and 65-70 at baseline), with evidence of faster decline in older people. In men, the 10 year decline, shown as change/range of test×100, in reasoning was −3.6% (95% confidence interval −4.1% to −3.0%) in those aged 45-49 at baseline and −9.6% (−10.6% to −8.6%) in those aged 65-70. In women, the corresponding decline was −3.6% (−4.6% to −2.7%) and −7.4% (−9.1% to −5.7%). Comparisons of longitudinal and cross sectional effects of age suggest that the latter overestimate decline in women because of cohort differences in education. For example, in women aged 45-49 the longitudinal analysis showed reasoning to have declined by −3.6% (−4.5% to −2.8%) but the cross sectional effects suggested a decline of −11.4% (−14.0% to −8.9%). Conclusions Cognitive decline is already evident in middle age (age 45-49). |
| ISSN | 09598138 |
| e-ISSN | 17561833 |
| Journal | BMJ (British Medical Journal) |
| Volume Number | 344 |
| Language | English |
| Publisher | British Medical Journal Publishing Group |
| Publisher Date | 2012-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Aging Psychology Cognition Disorders Epidemiology Physiopathology Age Of Onset Pathology Educational Status Epidemiologic Methods Neuropsychological Tests Statistics & Numerical Data Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Medicine |
| Content Type | Text |
| Resource Type | Article |
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