Clinical Orthopaedics and Related Research®

, Volume 468, Issue 2, pp 542–546 | Cite as

Comparing Patient Outcomes After THA and TKA: Is There a Difference?

  • Robert B. Bourne
  • Bert Chesworth
  • Aileen Davis
  • Nizar Mahomed
  • Kory Charron
Symposium: Papers Presented at the Hip Society Meetings 2009


Both primary total hip (THA) and knee (TKA) arthroplasty relieve pain, restore function, and increase mobility. Despite these successes, there is controversy as to whether THA or TKA provides greater or similar improvement. We therefore compared primary THA and TKA patient results in terms of (1) willingness to have surgery again; (2) WOMAC change score; (3) whether expectations were met; and (4) satisfaction. Patients undergoing primary THA were more willing to undergo their surgery again (THA 96%, TKA 89%), demonstrated greater WOMAC change scores, more frequently reported their expectations were met (THA 78%, TKA 70%), and expressed greater overall satisfaction (THA 89%, TKA 81%). In addition, patients undergoing THA expressed higher satisfaction with pain reduction while performing activities (ie, walking, stairs, and sitting/lying) and their ability to perform daily activities (ie, stairs, transportation, getting up, lying in bed, and light domestic duties) when compared with patients undergoing TKA. Our data suggest primary THA offers superior short-term outcomes when compared with primary TKA.

Level of Evidence: Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.


Sick Leave WOMAC Score Decision Date Maximize Response Rate High Functional Level 



We thank Mrs Susan Warner, Managing Director of the Ontario Joint Replacement Registry, and the Ontario orthopaedic surgeons who participated in the Ontario Joint Replacement Registry.


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Copyright information

© The Association of Bone and Joint Surgeons® 2009

Authors and Affiliations

  • Robert B. Bourne
    • 1
  • Bert Chesworth
    • 1
  • Aileen Davis
    • 1
  • Nizar Mahomed
    • 1
  • Kory Charron
    • 1
  1. 1.Division of Orthopaedic SurgeryUniversity Hospital, London Health Sciences Centre, University of Western OntarioLondonCanada

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