title: Weight Regain 10 Years After Roux-en-Y Gastric Bypass.
abstract: This study aims to investigate weight regain and the associated variables 10 years after Roux-en-Y gastric bypass.
  
  
  
  This retrospective study recruited patients submitted to Roux-en-Y gastric bypass (N = 166) for a 10-year follow-up. The following variables were investigated: body mass index (BMI), percentage of excess weight loss (%EWL), weight regain (WR), and percentage of weight regain (%WG). The chi-squared test or Fisher's exact test compared proportions, and the Mann-Whitney test compared numerical measurements between the groups. Analysis of variance (ANOVA) compared the measurements over time. The significance level was set at 5 %.
  
  
  
  The sample had a mean age of 39.59 ± 11.69 years, and females prevailed (71.7 %). In the long-term follow-up, 41 % of the patients had weight regain. Seventy-two months after surgery, excess weight, preoperative BMI, gender, age, nutritional monitoring, and iron deficiency did not explain weight regain. Younger patients had regained significantly more weight 96 (p = 0.008) and 120 months (p = 0.004) after surgery than older patients. Patients who regained weight had ferritin <15 μg/dL 96 months after surgery (p = 0.019).
  
  
  
  Patients submitted to Roux-en-Y gastric bypass presented weight regain, which increased over time. Age, iron deficiency, and time since surgery were associated with weight regain in the long-term follow-up.
authors: Graduate Program in Health Sciences, Puc-Campinas, Campinas, SP, Brazil.
authors: Daniela Vicinansa
authors: DV
authors: Monaco-Ferreira
authors: Graduate Program in Health Sciences, Puc-Campinas, Campinas, SP, Brazil. vapaleme@gmail.com.|School of Nutrition, Puc-Campinas, Campinas, SP, Brazil. vapaleme@gmail.com.
authors: Vânia Aparecida
authors: VA
authors: Leandro-Merhi
mesh_terms: D000328:Adult; D015992:Body Mass Index; D005260:Female; D015390:Gastric Bypass; D006801:Humans; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery*; D012189:Retrospective Studies; D015430:Weight Gain; D015431:Weight Loss
keywords: Bariatric surgery; Gastric bypass; Weight regain