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Obesity is a serious, chronic, and progressive disease associated with physiological dysfunctions that interact with circadian clock activity. Vertical gastrectomy (VG) is currently the most frequently performed bariatric procedure for the treatment of obesity. The objective of this case study was to verify the effect of VG on sleep quality, eating behavior, and metabolic parameters of obese individuals four months after the procedure. In this study, 14 volunteers (6 men and 8 women) aged 21–48 years (M = 35.57; SD = 7.33) were evaluated before and after VG. The Pittsburgh Sleep Quality Index, the Epworth Sleepiness Scale, the Binge Eating Scale, and the Night Eating Questionnaire were used as assessment instruments. Generalized linear models for repeated measures [Generalized estimating equation (GEE)] revealed significant differences in sleep quality (χ 2  = 10.145, df = 1, p = 0.001), excessive daytime sleepiness (χ 2  = 6.172, df = 1, p = 0.013), binge eating (χ 2  = 9.947, df = 1, p = 0.002) and night eating habits (χ 2  = 5.557, df = 1, p = 0.033). The results indicate that VG can cause improvements in overall sleep quality and can significantly reduce excessive daytime sleepiness levels, symptoms associated with binge eating, and metabolic parameters.

Effects of vertical gastrectomy on sleep quality, eating behavior, and metabolic parameters in obese adults: a case study