Alexithymia in severely obese patients seeking surgical treatment.
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The purpose of the study was to examine the rate of alexithymia as measured by the Toronto Alexithymia Scale in a sample of severely obese subjects, as well as the relationships between this dimension and five other dimensions found in obesity: depression, anhedonia, external locus of control, impulsivity, and interpersonal dependency. A second purpose was to test the hypothesis that alexithymia could be a prognosis factor in severely obese subjects seeking bariatric surgery. 49 severely obese and 40 psychiatric patients presenting mood, neurotic, or personality disorders participated. Analyses showed a significantly lower rate of alexithymia in severely obese (42.9%) than in psychiatric patients (67.5%). Interpersonal dependency was the main predictor of alexithymia in the two samples and impulsivity as well as anhedonia were independent predictors of alexithymia only in the severely obese sample. Preoperative Body Mass Index was the sole predictor of 1-yr. postoperative Body Mass Index in severely obese subjects receiving surgical treatment.