title: Poor diet quality and postoperative time are independent risk factors for weight regain after Roux-en-Y gastric bypass.
abstract: OBJECTIVE
  In this study, multivariate analyses was used to investigate factors associated with weight regain long after Roux-en-Y gastric bypass.
  
  
  METHODS
  This retrospective study comprised 80 patients (88.8% female) with at least 24 mo of postoperative time. Weight regain was defined as an increase of at least 10% of the lowest postoperative weight. The following data were collected: demographic characteristics, eating behavior, food intake, diet quality measured by the Healthy Eating Index, level of physical activity, follow-up visit attendance, anthropometric history, and postoperative time. Multivariate logistic regression generated a controlled analysis, followed by calculation of the odds ratio (OR).
  
  
  RESULTS
  The mean postoperative time was 47.0 ± 18.0 mo. The mean pre- and postoperative body mass indexes were 49.8 ± 9.3 kg/m(2) and 33.6 ± 7.2 kg/m(2), respectively. Despite satisfactory postoperative weight loss, 23.7% of the patients regained weight. After controlling for confounders, only postoperative time (OR 1.08; P < 0.01) and Healthy Eating Index (OR 0.95; P = 0.04) remained associated with weight regain.
  
  
  CONCLUSIONS
  Patients with long-term obesity and poor diet quality were at high risk of weight regain. These results suggest the need of nutritional monitoring during the late postoperative period, paying special attention to eating patterns.
authors.affiliation: Nutrition Graduate Program of University of Brasilia, DF, Brazil.
authors.forename: Fernanda Bassan Lopes
authors.initials: FB
authors.lastname: da Silva
authors.affiliation: Nutrition Graduate Program of University of Brasilia, DF, Brazil.
authors.forename: Daniela Lopes
authors.initials: DL
authors.lastname: Gomes
authors.affiliation: Nutrition Graduate Program of University of Brasilia, DF, Brazil. Electronic address: kenia@unb.br.
authors.forename: Kênia Mara Baiocchi
authors.initials: KM
authors.lastname: de Carvalho
mesh_terms: D000328:Adult; D004032:Diet / Q000009:adverse effects*; D015444:Exercise; D005247:Feeding Behavior; D005260:Female; D015390:Gastric Bypass / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009767:Obesity, Morbid / Q000473:pathology / Q000601:surgery*; D011184:Postoperative Period; D012189:Retrospective Studies; D012307:Risk Factors; D013997:Time Factors; D017211:Treatment Failure; D015430:Weight Gain; D055815:Young Adult
keywords: Bariatric surgery; Eating behavior; Food quality; Nutritional assessment; Postoperative period