Night eating syndrome in class II–III obesity: metabolic and psychopathological features

Jun 10, 2009International journal of obesity (2005)

Metabolic and mental health features of night eating in severe obesity

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Abstract

10.1% of participants with moderate-to-severe obesity met criteria for night eating syndrome (NES).

No significant differences were found in age, body mass index (BMI), or prevalence of metabolic syndrome between participants with and without NES.
Participants with NES reported higher levels of psychological distress, indicated by elevated scores on the Beck Depression Inventory (BDI) and the Impact of Weight on Quality of Life (IWQOL).
Among those diagnosed with NES, 18.5% showed moderate depression and 44.4% showed severe depression according to BDI scores.
Logistic regression analysis indicated that BDI score was the only variable significantly associated with the diagnosis of NES.

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OBJECTIVE: To investigate the relationship of metabolic disorders and psychological features with the night eating syndrome (NES) in individuals with moderate-to-severe obesity.

DESIGN: Cross-sectional observation.

SUBJECTS: A total of 266 consecutive participants with class II-III obesity, entering an inpatient weight loss program.

MEASUREMENTS: Participants who reported consuming either a large amount of their caloric intake after the evening meal (roughly self-assessed as > or =25% of daily calories) or the presence of nocturnal feeding at the Night Eating Questionnaire (NEQ) (N=49) were interviewed by the Night Eating Syndrome History and Inventory (NESHI). Assessment also included the clinical/biochemical parameters of the metabolic syndrome and several questionnaires of psychopathology. NES was diagnosed by NESHI criteria (evening hyperphagia (> or =25% of daily food intake after the evening meal) and/or waking at night to eat at least three times a week) in the last 3 months.

RESULTS: Twenty-seven participants (10.1%) met NESHI criteria. Differences were not observed between participants with and without NES as to age, body mass index (BMI), prevalence of metabolic syndrome, Binge Eating Scale and Body Shape Questionnaire. NES participants had significantly higher scores of Beck Depression Inventory (BDI) and Impact of Weight on Quality of Life (IWQOL). Among NES cases, the BDI score was indicative of moderate depression in 18.5% of cases and of severe depression in 44.4%. Logistic regression analysis, adjusted for confounders, identified the BDI score as the only variable significantly associated with the diagnosis of NES.

CONCLUSION: Diagnosing NES does not help identify obese individuals with specific medical complications, but indicates more severe psychological distress and depression.

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Night eating syndrome in class II–III obesity: metabolic and psychopathological features

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