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Body mass index across midlife and cognitive change in late life

Artikel i vetenskaplig tidskrift
Författare Anna K. Dahl
Linda Hassing
Eleonor I. Fransson
Margaret Gatz
Chandra A. Reynolds
Nancy L. Pedersen
Publicerad i International Journal of Obesity
Volym 37
Sidor 296–302
ISSN 0307-0565
Publiceringsår 2013
Publicerad vid Psykologiska institutionen
Sidor 296–302
Språk en
Länkar dx.doi.org/10.1038/ijo.2012.37
Ämnesord aging; body mass index; cognition; overweight; underweight
Ämneskategorier Psykologi, Folkhälsomedicinska forskningsområden

Sammanfattning

BACKGROUND: High midlife body mass index (BMI) has been linked to a greater risk of dementia in late life, but few have studied the effect of BMI across midlife on cognitive abilities and cognitive change in a dementia-free sample. METHODS: We investigated the association between BMI, measured twice across midlife (mean age 40 and 61 years, respectively), and cognitive change in four domains across two decades in the Swedish Adoption/Twin Study of Aging. RESULTS: Latent growth curve models fitted to data from 657 non-demented participants showed that persons who were overweight/obese in early midlife had significantly lower cognitive performance across domains in late life and significantly steeper decline in perceptual speed, adjusting for cardio-metabolic factors. Both underweight and overweight/obesity in late midlife were associated with lower cognitive abilities in late life. However, the association between underweight and low cognitive abilities did not remain significant when weight decline between early and late midlife was controlled for. CONCLUSION: There is a negative effect on cognitive abilities later in life related to being overweight/obese across midlife. Moreover, weight decline across midlife rather than low weight in late midlife per se was associated with low cognitive abilities. Weight patterns across midlife may be prodromal markers of late life cognitive health.

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