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This Trial Was Registered At Clinicaltrials.gov As NCT01746186 .
Objective: We evaluated energy and macronutrient intakes, body composition, and the basal metabolic rate (BMR) in obese female patients during the initial 3 y after an RYGB. Methods: Sixteen women with a mean SEM body mass index (in kg/m2) of 44.1 1.6 were included in this prospective observational study. The women were studied on 6 different occasions as follows: before and 1, 3, 6, 12 (n = 16), and 36 (n = 8) mo after surgery. On each occasion, food intake was evaluated from 4- or 7-d dietary records, body composition was assessed with the use of bio-impedancemetry, and energy expenditure was measured with the use of indirect calorimetry. Results: Body weight evolution showed the typical pattern reported after an RYGB. Total energy intake was 2072 108 kcal/d at baseline and decreased to 681 58 kcal/d at 1 mo after surgery (P < 0.05 compared with at baseline). Total energy intake progressively increased to reach 1240 87 kcal/d at 12 mo after surgery (P < 0.05 compared with at 1 mo after surgery) and 1448 57 kcal/d at 36 mo after surgery (P < 0.05 compared with at 12 mo after surgery). Protein intake was 87 4 g/d at baseline and 2 g/d 1 mo after surgery (P < 0.05 compared with at baseline) and increased progressively thereafter to reach 57 3 g/d at 36 mo after surgery (P < 0.05 compared with at 1 mo after surgery). Carbohydrate and fat intakes over time showed similar patterns.
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