Objective: Overweight, obesity, and associated problems in metabolic health are an increasing public health concern. Personality traits and emotional processing styles may play a role in the regulation of food intake and reward. Alexithymia is a personality construct involving difficulties in identifying and expressing emotions and has been previously associated with eating disorders and metabolic problems. We examined associations between alexithymia dimensions, Body Mass Index (BMI) and gestational diabetes in pregnant women.
Methods: The participants were 1660 pregnant women living in Finland from the FinnBrain Birth Cohort Study. We investigated the associations between alexithymia and its dimensions as measured by the Toronto Alexithymia Scale (TAS-20), overweight, and gestational diabetes. The effects of age, education, and depressive symptoms were controlled for using hierarchical regression analysis.
Results: Alexithymic individuals had a higher prevalence of overweight compared to those with low or moderate levels of alexithymia (66.0% vs. 34.8%, OR 3.6, adjusted OR 3.6, CI95% 1.9-6.8, p < .001). The dimension of Externally Oriented Thinking (EOT) accounted for this association. Compared to the lowest quartile, women in the highest EOT quartile had a higher BMI (24.3 vs. 25.6, p < .001), and a higher prevalence of overweight [adjusted OR 1.94, CI95% 1.43-2.62, p < .001] and gestational diabetes [OR 1.75, CI95% 1.19-2.55, p = .005].
Conclusions: Alexithymia, and especially its dimension of EOT is associated with overweight and gestational diabetes in pregnant women. Future studies should clarify causality and examine potential mechanisms and associations with pregnancy outcomes and fetal health.
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