title: Bariatric surgery in 1119 patients with preoperative body mass index<35 (kg/m(2)): results at 1 year.
abstract: BACKGROUND
  The use of body mass index (BMI) as the only criterion to indicate bariatric surgery is currently under discussion. There is growing evidence that supports bariatric surgery in carefully selected patients with lower BMI.
  
  
  OBJECTIVE
  To report our experience in bariatric surgery in>1000 patients with BMI<35 kg/m(2) and their results at 1 year.
  
  
  METHODS
  University hospital (censored).
  
  
  METHODS
  A retrospective analysis was performed in patients who underwent laparoscopic Roux-en-Y gastric bypass (LRYGB) or sleeve gastrectomy (SG) with preoperative BMI<35 kg/m(2) from January 2008 to December 2011. Demographic and anthropometric data, preoperative co-morbidities, and perioperative variables were retrieved. Weight loss and co-morbidities progression were analyzed 1 year after surgery and compared among procedures. A P value<.05 was considered significant.
  
  
  RESULTS
  We identified 1119 patients: mean age 38.8±11.4, 951 (85%) women, preoperative weight 87.5±9.3 kg and BMI 33.1 (31.9-34.1) kg/m(2). Preoperatively, 11.7% had type 2 diabetes mellitus, 25.9% arterial hypertension, 55.6% insulin resistance, and 53.2% dyslipidemia. In total, 283 patients (25.2%) underwent LRYGB and 836 (74.8%) SG. One year after surgery (follow-up: 66.67%) patients reached 24.5 (22.8-26.4) BMI and the percentage of excess of weight loss (%EWL) was 107.9±36.6%. Diabetes, hypertension, insulin resistance, and dyslipidemia remission/improvement rates were 54/39%, 58/29%, 72/17%, and 54/30%, respectively.
  
  
  CONCLUSIONS
  Bariatric surgery in selected class I obesity patients can safely be performed. We have observed good results in terms of weight loss and co-morbidity improvement/remission. Long-term follow-up is required.
authors.affiliation: Department of Digestive Surgery, Bariatric Surgery Unit, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Cristóbal
authors.initials: C
authors.lastname: Maiz
authors.affiliation: Department of Digestive Surgery, Bariatric Surgery Unit, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Juan
authors.initials: J
authors.lastname: Alvarado
authors.affiliation: Department of Digestive Surgery, Bariatric Surgery Unit, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Nicolás
authors.initials: N
authors.lastname: Quezada
authors.affiliation: Department of Digestive Surgery, Bariatric Surgery Unit, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: José
authors.initials: J
authors.lastname: Salinas
authors.affiliation: Department of Digestive Surgery, Bariatric Surgery Unit, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Funke
authors.affiliation: Department of Digestive Surgery, Bariatric Surgery Unit, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile. Electronic address: bozauc@mac.com.
authors.forename: Camilo
authors.initials: C
authors.lastname: Boza
mesh_terms: D000328:Adult; D050110:Bariatric Surgery / Q000009:adverse effects / Q000379:methods*; D015992:Body Mass Index; D002677:Chile; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D005743:Gastrectomy / Q000009:adverse effects / Q000379:methods; D015390:Gastric Bypass / Q000009:adverse effects / Q000379:methods; D006785:Hospitals, University; D006801:Humans; D010535:Laparoscopy / Q000009:adverse effects / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000175:diagnosis / Q000601:surgery*; D057234:Preoperative Period; D012189:Retrospective Studies; D013997:Time Factors; D016896:Treatment Outcome; D015431:Weight Loss / Q000502:physiology
keywords: Bariatric surgery; Body mass index; Class I obesity; Laparoscopic Roux-en-Y gastric bypass; Sleeve gastrectomy