title: The Welsh Institute for Minimal Access Therapy colonoscopy suitcase has construct and concurrent validity for colonoscopic polypectomy skills training: a prospective, cross-sectional study.
abstract: BACKGROUND
  The Welsh Institute for Minimal Access Therapy (WIMAT) colonoscopy suitcase is an ex vivo porcine simulator for polypectomy training.
  
  
  OBJECTIVE
  To establish whether this model has construct and concurrent validity.
  
  
  METHODS
  Prospective, cross-sectional study.
  
  
  METHODS
  Endoscopic training center.
  
  
  METHODS
  Twenty novice (N), 20 intermediate (I), 20 advanced (Ad), and 20 expert (E) colonoscopists.
  
  
  METHODS
  A simulated polypectomy task aimed at removing 2 polyps; A (simple), B (complex).
  
  
  METHODS
  Two accredited colonoscopists, blinded to group allocation, scored performances according to Direct Observation of Polypectomy Skills (DOPyS) assessment parameters. Group performances were compared. Real-life DOPyS scores were correlated to simulator DOPyS results.
  
  
  RESULTS
  Median overall DOPyS scores for novices were 1.00 (1.00-1.87) for A and 0.50 (0.00-1.00) for B (A vs B; P < .01). Intermediates scored 2.50 (2.00-2.88) for A and 2.00 (1.13-2.50) for B (A vs B; P = .03). The advanced group scored 3.00 (2.50-3.50) for A and 2.50 (2.00-3.00) for B (A vs B; P = .01). Experts scored 3.00 (3.00-3.88) for A and 3.00 (2.50-3.50) for B (A vs B; P = .47). Intergroup comparisons for A were, N vs I; P < .01, N vs Ad; P < .01, N vs E; P < .01, I vs Ad; P < .01, I vs E; P < .01, and Ad vs E; P = .46. Intergroup comparisons for B were, N vs I; P < .01, N vs Ad; P < .01, N vs E; P < .01, I vs Ad; P = .03, I vs E; P <.01, and Ad vs E; P = .06. There was no difference between real-life DOPyS scores and simulator scores (0.07).
  
  
  CONCLUSIONS
  The model does not have inbuilt assessment parameters.
  
  
  CONCLUSIONS
  This simulator demonstrates construct and concurrent validity for colon polypectomy training.
authors.affiliation: Welsh Institute for Minimal Access Therapy, Cardiff, Wales, United Kingdom.
authors.forename: James
authors.initials: J
authors.lastname: Ansell
authors.affiliation: University Hospital Llandough, Cardiff, Wales, United Kingdom.
authors.forename: Joanna J
authors.initials: JJ
authors.lastname: Hurley
authors.affiliation: University Hospital of Wales, Wales, United Kingdom.
authors.forename: James
authors.initials: J
authors.lastname: Horwood
authors.affiliation: Cardiff University School of Medicine, Cardiff, Wales, United Kingdom.
authors.forename: Chantelle
authors.initials: C
authors.lastname: Rizan
authors.affiliation: Welsh Institute for Minimal Access Therapy, Cardiff, Wales, United Kingdom.
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Arnaoutakis
authors.affiliation: Welsh Institute for Minimal Access Therapy, Cardiff, Wales, United Kingdom.
authors.forename: Stuart
authors.initials: S
authors.lastname: Goddard
authors.affiliation: Welsh Institute for Minimal Access Therapy, Cardiff, Wales, United Kingdom.
authors.forename: Neil
authors.initials: N
authors.lastname: Warren
authors.affiliation: University Hospital of Wales, Wales, United Kingdom.
authors.forename: Jared
authors.initials: J
authors.lastname: Torkington
mesh_terms: D000818:Animals; D002983:Clinical Competence; D003111:Colonic Polyps / Q000601:surgery*; D003113:Colonoscopy / Q000193:education*; D003430:Cross-Sectional Studies; D006801:Humans; D023421:Models, Animal; D011446:Prospective Studies; D013552:Swine; D013647:Task Performance and Analysis