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

Marques, Carlos J; Pinnschmidt, Hans O; Bohlen, Karina; Lorenz, Juergen; Lampe, Frank · J Orthop · 2020

retrospective_cohort · Level III

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Abstract

To investigate whether WOMAC scores changes after THA or TKA are gender and joint specific. Retrospective cohort study. The data of 855 THA and 684 TKA patients were analyzed. 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). 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.