title: Patient-reported outcome and risk of revision after shoulder replacement for osteoarthritis. 1,209 cases from the Danish Shoulder Arthroplasty Registry, 2006-2010.
abstract: OBJECTIVE
  We used patient-reported outcome and risk of revision to compare hemiarthroplasty (HA) with total shoulder arthroplasty (TSA) and stemmed hemiarthroplasty (SHA) with resurfacing hemiarthroplasty (RHA) in patients with glenohumeral osteoarthritis.
  
  
  METHODS
  We included all patients reported to the Danish Shoulder Arthroplasty Registry (DSR) between January 2006 and December 2010. 1,209 arthroplasties in 1,109 patients were eligible. Western Ontario Osteoarthritis of the Shoulder index (WOOS) was used to evaluate patient-reported outcome 1 year postoperatively. For simplicity of presentation, the raw scores were converted to a percentage of the maximum score. Revision rates were calculated by checking reported revisions to the DSR until December 2011. WOOS and risk of revision were adjusted for age, sex, previous surgery, and type of osteoarthritis.
  
  
  RESULTS
  There were 113 TSAs and 1096 HAs (837 RHAs and 259 SHAs). Patients treated with TSA generally had a better WOOS, exceeding the predefined minimal clinically important difference, at 1 year (mean difference 10, p < 0.001). RHA had a better WOOS than SHA (mean difference 5, p = 0.02), but the difference did not exceed the minimal clinically important difference. There were no statistically significant differences in revision rate or in adjusted risk of revision between any of the groups.
  
  
  CONCLUSIONS
  Our results are in accordance with the results from other national shoulder registries and the results published in systematic reviews favoring TSA in the treatment of glenohumeral osteoarthritis. Nonetheless, this registry study had certain limitations and the results should be interpreted carefully.
authors.affiliation: Department of Orthopedic Surgery , Herlev University Hospital , Denmark.
authors.forename: Jeppe V
authors.initials: JV
authors.lastname: Rasmussen
authors.forename: Anne
authors.initials: A
authors.lastname: Polk
authors.forename: Stig
authors.initials: S
authors.lastname: Brorson
authors.forename: Anne Kathrine
authors.initials: AK
authors.lastname: Sørensen
authors.forename: Bo S
authors.initials: BS
authors.lastname: Olsen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019643:Arthroplasty, Replacement; D005260:Female; D062785:Hemiarthroplasty; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery*; D016059:Range of Motion, Articular; D012042:Registries; D012086:Reoperation / Q000706:statistics & numerical data; D057566:Self Report; D012785:Shoulder Joint / Q000601:surgery*; D011795:Surveys and Questionnaires; D016896:Treatment Outcome