Evolution of dementia diagnosis over time (1988-2013): Evidence from French and English cohorts. Implication for secular trends analyses.
Alzheimer's & dementia (Amsterdam, Netherlands)
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Grasset, L., Matthews, F. E., Pérès, K., Foubert-Samier, A., Helmer, C., Dartigues, J., & Brayne, C. (2018). Evolution of dementia diagnosis over time (1988-2013): Evidence from French and English cohorts. Implication for secular trends analyses.. Alzheimer's & dementia (Amsterdam, Netherlands), 10 490-497. https://doi.org/10.1016/j.dadm.2018.07.005
Introduction: The aims of this study are to examine the evolution of clinical dementia diagnosis over 3 decades and to investigate secular trends of dementia. Methods: Four cohorts covering a period from 1988 to 2013 were used: the Personnes Agées Quid and Three-City-Bordeaux studies, and the Cognitive Function and Aging Study (CFAS) I and II. Mini-Mental State Examination scores at clinical diagnosis were evaluated over a 24-year follow-up period in French studies. An algorithmic approach was applied to CFAS I and II to provide dementia prevalence and incidence estimates. Results: A significant increase of the Mini-Mental State Examination score at diagnosis was observed until 2000 and a significant decrease after. We reported a prevalence of 8.8% for CFAS I (1990-1993) compared with a prevalence of 6.5% in CFAS II (2008-2011). The 2-year incidence rate was estimated at 31.2/1000 (95% confidence interval = 28.0-34.8) for CFAS I and 15.0/1000 (95% confidence interval = 13.5-16.7) for CFAS II. Discussion: Applying a stable algorithm to different cohorts across time can provide a robust method for time trends estimation.
Includes MRC grants.
External DOI: https://doi.org/10.1016/j.dadm.2018.07.005
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286863
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Licence URL: https://creativecommons.org/licenses/by-nc-nd/4.0/