title: [Long-term efficacy and safety of Roux-en-Y gastric bypass and gastric banding: systematic review].
abstract: BACKGROUND
  Bariatric surgery has increased substantially in the last years. However, there are controversies of the long-term efficacy and safety.
  
  
  OBJECTIVE
  To evaluate the long-term efficacy and safety of Roux-en-Y gastric bypass (BGRY) and gastric banding (Band) in randomized controlled trials and cohort studies.
  
  
  METHODS
  We searched for randomized controlled trials and cohort studies of BGRY and Band, with a follow-up > 48 months, with description of weight loss, complications and mortality.
  
  
  RESULTS
  Four randomized trials and one cohort study met the inclusion criteria. Mean weight loss was greater with BGRY (27%-39%) than with Band (13%-35%). In both procedures the complication rate is high. Second operation rate is higher with Band.
  
  
  CONCLUSIONS
  The outcomes observed from this revision are not sufficient to generalize the efficacy and safety of bariatric surgery to population attended at different health care systems.
authors.affiliation: Hospital Regional número 110, Instituto Mexicano del Seguro Social, Guadalajara, México.
authors.forename: R
authors.initials: R
authors.lastname: Camberos-Solis
authors.forename: A
authors.initials: A
authors.lastname: Jiménez-Cruz
authors.forename: M
authors.initials: M
authors.lastname: Bacardí-Gascón
authors.forename: J M
authors.initials: JM
authors.lastname: Culebras
mesh_terms: D000293:Adolescent; D000328:Adult; D000713:Anastomosis, Roux-en-Y / Q000009:adverse effects; D050110:Bariatric Surgery / Q000009:adverse effects; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery*; D016032:Randomized Controlled Trials as Topic; D012449:Safety; D016896:Treatment Outcome; D015431:Weight Loss / Q000502:physiology; D055815:Young Adult