Body mass index and incidence of dementia: the PAQUID study.

Nourhashémi, F; Deschamps, V; Larrieu, S; Letenneur, L; Dartigues, J-F; Barberger-Gateau, P; PAQUID study. Personnes Agées Quid · Neurology · 2003

prospective_cohort · Level II

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Abstract

To study the relationship between body mass index (BMI) and risk of dementia, a cohort of 3,646 individuals aged > or =65 years living at home and without cognitive disorders at baseline were followed up for 8 years (the PAQUID [Personnes Agées Quid] Study). Subjects with a BMI < 21 had an increased risk of developing dementia as compared with subjects whose BMI was between 23 and 26 (odds ratio = 1.48, 95% CI = 1.08 to 2.04). However, when individuals who developed dementia early during the follow-up were excluded from the analysis, this relationship was no longer significant. A low BMI does not in itself seem to be a risk factor for dementia.

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