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Being overweight in midlife is associated with lower cognitive ability and steeper cognitive decline in late life.

Artikel i vetenskaplig tidskrift
Författare Anna Dahl
Linda Hassing
Eleonor Fransson
Stig Berg
Margaret Gatz
Chandra A Reynolds
Nancy L Pedersen
Publicerad i The journals of gerontology. Series A, Biological sciences and medical sciences
Volym 65
Nummer/häfte 1
Sidor 57-62
ISSN 1758-535X
Publiceringsår 2010
Publicerad vid Psykologiska institutionen
Sidor 57-62
Språk en
Länkar dx.doi.org/10.1093/gerona/glp035
Ämnesord Adult, Aging, Body Mass Index, Cognition, physiology, Cognition Disorders, epidemiology, etiology, psychology, Female, Humans, Male, Middle Aged, Overweight, complications, epidemiology, psychology, Prevalence, Prognosis, Questionnaires, Retrospective Studies, Risk Factors, Sweden, epidemiology
Ämneskategorier Folkhälsomedicinska forskningsområden

Sammanfattning

BACKGROUND: Although an increasing body of evidence links being overweight in midlife with an increased risk for dementia in late life, no studies have examined the association between being overweight in midlife and cognitive ability in late life. Our aim was to examine the association between being overweight in midlife as measured by body mass index (BMI) and cognitive ability assessed over time. METHODS: Participants in the Swedish Adoption/Twin Study Aging were derived from a population-based sample. The participants completed baseline surveys in 1963 or 1973 (mean age 41.6 years, range 25-63 years). The surveys included questions about height, weight, diseases, and lifestyle factors. Beginning in 1986, the same individuals were assessed on neuropsychological tests every 3 years (except in 1995) until 2002. During the study period, 781 individuals who were 50 years and older (60% women) had at least one complete neuropsychological assessment. A composite score of general cognitive ability was derived from the cognitive test battery for each measurement occasion. RESULTS: Latent growth curve models adjusted for twinness showed that persons with higher midlife BMI scores had significantly lower general cognitive ability and significantly steeper longitudinal decline than their thinner counterparts. The association did not change substantially when persons who developed dementia during the study period were excluded from the analysis. CONCLUSIONS: Higher midlife BMI scores precede lower general cognitive ability and steeper cognitive decline in both men and women. The association does not seem to be mediated by an increased risk for dementia.

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