Differences in 1‑year outcome after primary total hip and knee arthroplasty : A cohort study in older patients with osteoarthritis.

Background: Patients who undergo primary total hip (THA) and knee (TKA) arthroplasty show better clinical outcomes, improved quality of life and increased participation in leisure activities; however, the differences between primary THA and TKA in older patients are unknown.

Objective: The aim of the study was to compare the Western Ontario and McMasters University osteoarthritis index (WOMAC) scores and changes in WOMAC scores, the Medical Outcomes study 12-item short-form version 2 (SF-12) mental and physical health scales, satisfaction and frequency of participation in leisure activities in older osteoarthritis patients with a mean age of 67.9 ± 10.