title: Patient-reported outcomes and outcome predictors after primary total hip arthroplasty: results from the Dresden Hip Surgery Registry.
abstract: OBJECTIVE
  To investigate response rates and predictors of treatment success in patients treated with total hip arthroplasty (THA).
  
  
  METHODS
  A prospective register-based cohort study including all consecutive primary THAs was conducted -between 01/2006-12/2011. Primary outcomes were changes in WOMAC, according to OMERACT-OARSI, and minimal important difference (MID) in quality of life (EQ-5D) between baseline and 6-month follow-up. Socioeconomic and clinical predictors on treatment success were analysed by bivariate/multivariate regression.
  
  
  RESULTS
  The study population included 2,553 patients (mean age 60.8 years; 52.8% female) and 2,391 (93.7%) at follow-up. 2,194 (93.8%) (OMERACT-OARSI) and 2,131 (83.5%) (EQ-5D MID) patients were classified as responders. Predictors for treatment success vs treatment failure were not identified. Obese patients and patients living alone showed less pronounced, and patients with higher educational level more pronounced, improvements in the WOMAC at follow-up.
  
  
  CONCLUSIONS
  Treatment with THA leads to improvement in function, decline in pain and increase in quality of life in the vast majority of patients.
authors.affiliation: Center for Evidence-based Healthcare, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.|Center for Orthopaedic and Trauma Surgery, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Haase
authors.affiliation: Center for Evidence-based Healthcare, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Kopkow
authors.affiliation: Center for Orthopaedic and Trauma Surgery, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.
authors.forename: Franziska
authors.initials: F
authors.lastname: Beyer
authors.affiliation: Center for Orthopaedic and Trauma Surgery, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Lützner
authors.affiliation: Clinic for Orthopedics, St. Vincentius Hospital, Karlsruhe - Germany.
authors.forename: Stephan
authors.initials: S
authors.lastname: Kirschner
authors.affiliation: Center for Orthopaedic and Trauma Surgery, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.
authors.forename: Albrecht
authors.initials: A
authors.lastname: Hartmann
authors.affiliation: Center for Evidence-based Healthcare, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.
authors.forename: Jochen
authors.initials: J
authors.lastname: Schmitt
authors.affiliation: Center for Orthopaedic and Trauma Surgery, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden - Germany.
authors.forename: Klaus-Peter
authors.initials: KP
authors.lastname: Günther
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000706:statistics & numerical data*; D015331:Cohort Studies; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000453:epidemiology / Q000601:surgery*; D000071066:Patient Reported Outcome Measures; D011788:Quality of Life; D012042:Registries; D012959:Socioeconomic Factors