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. 2010;34(4):222-9.
doi: 10.1159/000297742. Epub 2010 Mar 18.

Longitudinal examination of obesity and cognitive function: results from the Baltimore longitudinal study of aging

John Gunstad  1 , April Lhotsky, Carrington Rice Wendell, Luigi Ferrucci, Alan B Zonderman
Affiliations

Longitudinal examination of obesity and cognitive function: results from the Baltimore longitudinal study of aging

John Gunstad et al. Neuroepidemiology. 2010.

Abstract

Background: Obesity indices (i.e. BMI, waist-to-hip ratio) show differential relationships to other health outcomes, though their association to neurocognitive outcome is unclear.

Methods: We examined whether central obesity would be more closely associated with cognitive function in 1,703 participants from the Baltimore Longitudinal Study of Aging.

Results: Longitudinal mixed-effects regression models showed multiple obesity indices were associated with poorer performance in a variety of cognitive domains, including global screening measures, memory, and verbal fluency tasks. Obesity was associated with better performance on tests of attention and visuospatial ability. An obesity index by age interaction emerged in multiple domains, including memory and attention/executive function.

Conclusion: Obesity indices showed similar associations to cognitive function, and further work is needed to clarify the physiological mechanisms that link obesity to poor neurocognitive outcome.

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Fig. 1
Fig. 1
Longitudinal rate of change in cognitive performance as a function of age for number of errors on the Blessed IMC Test by BMI (a), waist circumferences (b), and waist-hip ratio (c), and Trail Making Test A time to completion by BMI (d), waist circumferences (e), and waist-hip ratio (f).
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