title: Relationship Between Diet and Body Composition After Biliopancreatic Diversion.
abstract: BACKGROUND
  Biliopancreatic diversion (BPD) has been shown to be one of the most effective techniques for losing weight, although the relationship between body composition and diet after the procedure is not well known. Our aim was to assess dietary changes and their effects on body composition.
  
  
  METHODS
  This longitudinal study included all patients eligible for BPD who had undergone body composition analysis. Two assessments were performed: 6 weeks before and 1 year after surgery. Nutritional education was given after surgery by a registered dietitian, and dual energy X-ray absorptiometry was performed and a 3-day food record was collected for further analysis at both of the visits.
  
  
  RESULTS
  Forty-six patients were included. The percentage of excess of weight loss was 61.03 % (SD 14.01 %), which was statistically different by gender (p = 0.045). The percentage of subjects reporting a low daily protein consumption of less than 60 g and 1.2 g/kg of ideal body weight (IBW)/day was 15.2 % before surgery and 19.6 % at 12 months (p = 0.006). The weight loss was mainly of fat mass (FM). There were differences of body composition by gender before and after surgery. A simple correlation analysis showed a significant association between daily energy intake and FM (g) only before surgery (p = 0.030), and also between daily protein intake (expressed as total g) and lean body mass (LBM) 12 months after surgery (p = 0.018), but no association was found with achieved protein goal.
  
  
  CONCLUSIONS
  BPD enhanced by nutritional education seems to improve its results by achieving an adequate weight loss, preserving LBM, decreasing FM, and guaranteeing an appropriate protein intake.
authors.affiliation: Department of Endocrinology and Nutrition, Clinical Nutrition and Dietetics Unit, Complejo Asistencial Universitario de León, Altos de Nava s/n., 24008, León, Spain. calleja.alicia@gmail.com.
authors.forename: Alicia
authors.initials: A
authors.lastname: Calleja-Fernández
authors.affiliation: Department of Endocrinology and Nutrition, Clinical Nutrition and Dietetics Unit, Complejo Asistencial Universitario de León, Altos de Nava s/n., 24008, León, Spain.
authors.forename: Begoña
authors.initials: B
authors.lastname: Pintor-de-la-Maza
authors.affiliation: Department of Gastroenterology, Complejo Asistencial Universitario de León, Altos de Nava s/n, 24008, León, Spain.
authors.forename: Rubén
authors.initials: R
authors.lastname: Diez-Rodríguez
authors.affiliation: Department of Endocrinology and Nutrition, Clinical Nutrition and Dietetics Unit, Complejo Asistencial Universitario de León, Altos de Nava s/n., 24008, León, Spain.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Vidal-Casariego
authors.affiliation: Department of Endocrinology and Nutrition, Clinical Nutrition and Dietetics Unit, Complejo Asistencial Universitario de León, Altos de Nava s/n., 24008, León, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Urioste-Fondo
authors.affiliation: Department of Endocrinology and Nutrition, Clinical Nutrition and Dietetics Unit, Complejo Asistencial Universitario de León, Altos de Nava s/n., 24008, León, Spain.
authors.forename: Isidoro
authors.initials: I
authors.lastname: Cano-Rodríguez
authors.affiliation: Department of Endocrinology and Nutrition, Clinical Nutrition and Dietetics Unit, Complejo Asistencial Universitario de León, Altos de Nava s/n., 24008, León, Spain.
authors.forename: María D
authors.initials: MD
authors.lastname: Ballesteros-Pomar
mesh_terms: D015502:Absorptiometry, Photon; D000328:Adult; D015904:Biliopancreatic Diversion / Q000534:rehabilitation / Q000706:statistics & numerical data; D001823:Body Composition; D004032:Diet; D015930:Diet Records; D004034:Diet Surveys; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000378:metabolism / Q000534:rehabilitation / Q000601:surgery*; D015431:Weight Loss
keywords: Bariatric surgery; Body composition; Lean body mass; Morbid obesity; Protein intake