title: Responsiveness of patient reported outcome measures in total joint arthroplasty patients.
abstract: This study reports the responsiveness to change and minimal clinically important difference (MCID) of three patient reported outcome measures following total hip arthroplasty (THA) and total knee arthroplasty (TKA). Patient-reported outcome measures were collected preoperatively and 3 months postoperatively for 391 patients enrolled in the California Joint Replacement Registry. Effect size, standardized response means, and MCID were calculated for each measure. The WOMAC and the SF12v2 physical component summary (PCS) score were the most responsive to perioperative changes. The MCID was 4.97 for the SF12v2 PCS and 10.21 for the WOMAC. THA patients were more likely to exhibit improvements above the MCID than TKA patients. The WOMAC and SF12v2 PCS are useful to measure health status changes in TJA patients.
  
  
  METHODS
  Prognostic Level II.
authors.affiliation: University of California, Los Angeles, UCLA School of Medicine, Los Angeles, California.
authors.forename: Nelson F
authors.initials: NF
authors.lastname: SooHoo
authors.affiliation: University of California, Davis, School of Medicine, Department of Internal Medicine, Sacramento, California.
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Li
authors.affiliation: Pacific Business Group on Health, San Francisco, California.
authors.forename: Kate E
authors.initials: KE
authors.lastname: Chenok
authors.affiliation: University of California, San Francisco, Department of Orthopaedic Surgery, San Francisco, California; University of California, San Francisco, Philip R. Lee Institute for Health Policy Studies, San Francisco, California.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Bozic
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000706:statistics & numerical data; D019645:Arthroplasty, Replacement, Knee / Q000706:statistics & numerical data; D002140:California / Q000453:epidemiology; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D063868:Patient Outcome Assessment; D012042:Registries; D057566:Self Report; D016896:Treatment Outcome
keywords: functional outcomes; patient reported outcome measures; registry; total hip arthroplasty; total knee arthroplasty