Defining an International Standard Set of Outcome Measures for Patients with Hip or Knee Osteoarthritis: Consensus of the International Consortium for Health Outcomes Measurement Hip and Knee Osteoarthritis Working Group.
OBJECTIVE: To define a minimum Standard Set of outcome measures and case-mix factors for monitoring, comparing, and improving healthcare for patients with clinically diagnosed hip or knee osteoarthritis (OA) with a focus on defining the outcomes that matter most to patients. METHODS: An international Working Group (WG) of patients, arthroplasty register experts, orthopedic surgeons, primary care