title: Obesity surgery mortality risk score for the prediction of complications after laparoscopic bariatric surgery.
abstract: BACKGROUND
  Morbimortality after bariatric surgery varies according to patient characteristics and associated comorbidities. The aim of this study was to evaluate the usefulness of the Obesity sugery mortality risk score scale (OS-MRS) to predict the risk of postoperative complications after bariatric surgery.
  
  
  METHODS
  A retrospective study was performed of a prospective series of patients undergoing bariatric surgery in which the OS-MRS scale was applied preoperatively. Postoperative complications were classified as proposed by Dindo-Clavien. We analyzed the relationship between the categories of OS-MRS scale: A) low risk, B) intermediate risk, and C) high risk and the presence of complications.
  
  
  RESULTS
  Between May 2008 and June 2012, 198 patients were included (85 [42.9%] after gastric bypass and 113 [57.1%] after sleeve gastrectomy). Using the OS-MRS scale, 124 patients were classified as class A (62.6%), 70 as class B (35.4%) and 4 as class C (2%). The overall morbidity rate was 12.6% (25 patients). A significant association between OS-MRS scale and rate of complications (7.3, 20 and 50%, respectively, P=.004) was demonstrated. The gastric bypass was associated with a higher complication rate than sleeve gastrectomy (P=.007). In multivariate analysis, OS-MRS scale and surgical technique were the only significant predictive factors.
  
  
  CONCLUSIONS
  The OS-MRS scale is a useful tool to predict the risk of complications and can be used as a guide when choosing the type of bariatric surgery.
authors.affiliation: Sección de Cirugía Gastrointestinal, Servicio de Cirugía, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España.
authors.forename: Leyre
authors.initials: L
authors.lastname: Lorente
authors.affiliation: Sección de Cirugía Gastrointestinal, Servicio de Cirugía, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España. Electronic address: jramon@parcdesalutmar.cat.
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Ramón
authors.affiliation: Sección de Cirugía Gastrointestinal, Servicio de Cirugía, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España.
authors.forename: Pablo
authors.initials: P
authors.lastname: Vidal
authors.affiliation: Servicio de Endocrinología, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España; Departamento de Medicina, Universidad Autónoma de Barcelona, Bellaterra, Barcelona, España.
authors.forename: Alberto
authors.initials: A
authors.lastname: Goday
authors.affiliation: Servicio de Endocrinología, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España.
authors.forename: Alejandra
authors.initials: A
authors.lastname: Parri
authors.affiliation: Sección de Cirugía Gastrointestinal, Servicio de Cirugía, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España.
authors.forename: Enrique
authors.initials: E
authors.lastname: Lanzarini
authors.affiliation: Sección de Cirugía Gastrointestinal, Servicio de Cirugía, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España; Departamento de Cirugía, Universidad Autónoma de Barcelona, Bellaterra, Barcelona, España.
authors.forename: Manuel
authors.initials: M
authors.lastname: Pera
authors.affiliation: Sección de Cirugía Gastrointestinal, Servicio de Cirugía, Hospital Universitario del Mar, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, España; Departamento de Cirugía, Universidad Autónoma de Barcelona, Bellaterra, Barcelona, España.
authors.forename: Luis
authors.initials: L
authors.lastname: Grande
mesh_terms: D005260:Female; D015390:Gastric Bypass / Q000009:adverse effects* / Q000379:methods / Q000401:mortality*; D015391:Gastroplasty / Q000009:adverse effects* / Q000379:methods / Q000401:mortality*; D006801:Humans; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery*; D011183:Postoperative Complications / Q000401:mortality; D011379:Prognosis; D012189:Retrospective Studies; D018570:Risk Assessment; D011795:Surveys and Questionnaires
keywords: Bariatric surgery; Cirugía bariátrica; Complicaciones quirúrgicas; Factores predictivos; Morbid obesity; Obesidad mórbida; Predictive factors; Surgical complications