TKA patients experience less improvement than THA patients at 3 and 12 months after surgery. A retrospective observational cohort study

Carlos J Marques; Hans O Pinnschmidt; Karina Bohlen; Juergen Lorenz; Frank Lampe

doi:10.1016/j.jor.2020.09.007

TKA patients experience less improvement than THA patients at 3 and 12 months after surgery. A retrospective observational cohort study

J Orthop. 2020 Sep 17:21:517-522. doi: 10.1016/j.jor.2020.09.007. eCollection 2020 Sep-Oct.

Authors

Carlos J Marques¹, Hans O Pinnschmidt², Karina Bohlen³, Juergen Lorenz⁴, Frank Lampe^{3

4}

Affiliations

¹ Science Office of the Orthopaedic and Joint Replacement Department at the Schoen Clinic Hamburg Eilbek, Dehnhaide 120, D-22081, Hamburg, Germany.
² Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
³ Orthopaedic and Joint Replacement Department at the Schoen Clinic Hamburg Eilbek, Dehnhaide 120, D-22081, Hamburg, Germany.
⁴ Faculty of Life Sciences at the Hamburg University of Applied Sciences, Ulmenliet 20, D-21033, Hamburg, Germany.

Abstract

Purpose: To investigate whether WOMAC scores changes after THA or TKA are gender and joint specific.

Methods: Retrospective cohort study. The data of 855 THA and 684 TKA patients were analyzed.

Results: Follow-up time (p < 0.001), gender (p < 0.001), joint (p < 0.001), and interaction FU by joint (p < 0.001) had significant effects on WOMAC total and sub-scores. Patients after TKA perceived less improvement in all dimensions in comparison to THA patients (p < 0.001).

Conclusion: WOMAC score changes after THA or TKA are joint-specific. Patients after TKA perceived less improvement. These results can be used to adjust patients' expectations.

Keywords: Clinical outcomes; Patient reported outcome measures; Total hip replacement; Total knee replacement; WOMAC.