Nutrition, Overweight, and Cognition in Euthymic Bipolar Individuals Compared to Healthy Controls
Bernd Reininghaus; Nina Dalkner; Christiane Schörkhuber; Eva Fleischmann; Frederike T. Fellendorf; Michaela Ratzenhofer; Alexander Maget; Martina Platzer; Susanne A. Bengesser; Adelina Tmava-Berisha; Melanie Lenger; Robert Queissner; Elena M. D. Schönthaler; Eva Z. Reininghaus
Bipolar disorder (BD) is associated with impairments in cognitive functions, in which metabolic factors, e.g., overweight, seem to play a significant role. The aim of this study was to investigate the association between nutritional factors and cognitive performance in euthymic individuals with BD. A study cohort of 56 euthymic individuals with BD was compared to a sample of 53 mentally healthy controls. To assess cognitive function, the following tests were applied: California Verbal Learning Test, Trail Making Test A/B, d2 Test of Attention-Revised, and Stroop&rsquo:s Color-Word Interference Test. Furthermore, a 4-day food record was processed to evaluate dietary intake of macronutrients, specific micronutrients, and food diversity. Body mass index and waist to height ratio were calculated to assess overweight and central obesity. Results showed no nutritional differences between individuals with BD and controls. Individuals with BD performed worse in the d2 test than controls. Hierarchical regression analyses yielded no association between cognitive and nutritional parameters. However, waist to height ratio was negatively correlated with almost all cognitive tests. Central obesity seems to affect cognitive functioning in BD, while the lack of finding differences in nutritional data might be due to problems when collecting data and the small sample size. Consequently, further studies focusing on objectively measuring food intake with adequate sample size are needed.
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