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Lower cognitive functioning as a predictor of weight gain in bipolar disorder: a 12‐month study
Author(s) -
Bond D. J.,
Torres I. J.,
Lee S. S.,
Kozicky J.M.,
Silveira L. E.,
Dhanoa T.,
Lam R. W.,
Yatham L. N.
Publication year - 2017
Publication title -
acta psychiatrica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.849
H-Index - 146
eISSN - 1600-0447
pISSN - 0001-690X
DOI - 10.1111/acps.12674
Subject(s) - body mass index , cognition , weight gain , bipolar disorder , effects of sleep deprivation on cognitive performance , verbal memory , psychology , longitudinal study , cognitive skill , working memory , medicine , clinical psychology , psychiatry , body weight , pathology
Objective In cross‐sectional studies, elevated body mass index (BMI) is associated with cognitive impairment in bipolar disorder (BD). We investigated the direction of this association by prospectively examining changes in BMI and cognition. Method We measured BMI and performance in six cognitive domains over 12 months in 80 adolescent and young adult BD patients and 46 healthy comparison subjects (HS). Ninety‐three percent of patients received pharmacotherapy and 84% were euthymic. We used repeated‐measures ancova and longitudinal mixed models to investigate whether (i) higher BMI and increasing BMI over time predicted lower subsequent cognitive functioning, and (ii) lower cognitive functioning and changes in cognition predicted increasing BMI. Results Neither baseline BMI nor BMI change predicted lower cognitive functioning. Lower baseline scores in attention, verbal memory, working memory, and a composite measure of global cognition predicted increasing BMI in patients and HS. In patients, lower cognitive functioning remained associated with increasing BMI when clinical and treatment variables were adjusted for. Improvement in working memory predicted a smaller subsequent BMI increase in patients. Conclusion Lower cognitive functioning in specific domains predicts increasing BMI in patients with BD and healthy young adults. Targeting cognition may be important for minimizing weight gain in BD.