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BODY MASS INDEX IN EARLY AND LATE MIDLIFE AND COGNITIVE ABILITIES IN LATE LIFE

Paper i proceeding
Författare Anna Dahl
Linda Hassing
E. Fransson
M. Gatz
C. A. Reynolds
N. L. Pedersen
Publicerad i Gerontologist
Volym 51
Nummer/häfte Supplement 2
Sidor 290
ISSN 0016-9013
Publiceringsår 2011
Publicerad vid Psykologiska institutionen
Sidor 290
Språk en
Länkar dx.doi.org/10.1093/geront/gns068
Ämnesord aging; body mass index; cognition; overweight; underweight
Ämneskategorier Medicin och Hälsovetenskap

Sammanfattning

The aims of this study were to study the association between early and late midlife body mass index (BMI), change in BMI, and late life cognitive abilities in a dementia free sample. BMI was calculated from self-reported height and weight in early midlife (mean age 39.9 years, range 25-50) (1963 or 1973) and from assessed weight and height in late midlife (mean age 61.1 years, range 50-75). Starting in 1986 participants were assessed five times at three year intervals on a cognitive test battery in the longitudinal Swedish doption/Twin Study of Aging (N=657). Latent growth curve models, adjusting for pairness, showed that persons with higher BMI in early midlife had significantly lower cognitive performance across domains in late life. Moreover, obesity was significantly associated with a steeper decline in perceptual speed and non-significantly associated with steeper decline in verbal and spatial abilities. Both being underweight and overweight/obese in late life were associated with an increased risk of lower cognitive abilities across domains. However, when decline in BMI was controlled for, underweight in late midlife was no longer associated with lower cognitive ability in any domain. Further, being underweight across midlife, and weight loss between early and late midlife, were each associated with lower mean level cognitive abilities in late life (centered at age 65). In conclusion, several different weight patterns were associated with lower cognitive abilities in late life. Weight patterns may be an important clue to understand the association between weight and cognitive health in late life.

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