Abstract Purpose Evaluate the impact of patient age, body mass index (BMI), medial/central patellofemoral arthritis, and anterior cruciate ligament (ACL) deficiency on five-year patient-reported outcome measures (PROMs) of fixed-bearing medial unicompartmental knee arthroplasty (UKA). Methods A consecutive group of 229 patients (240 knees) received fixed-bearing medial UKA. At minimum two ( n = 231 knees) and five years ( n = 221 knees), patients completed the Oxford Knee Score (OKS), the EuoQol-5D (EQ-5D), Knee injury and Osteoarthritis Outcome Score Physical Function Short Form (KOOS-PS), University of California, Los Angeles (UCLA) activity score, Forgotten Joint Score (FJS), and their level of satisfaction. Sub-group analyses compared PROMs in patients based on: (i) Grade III/IV vs. Grade 0–III medial/central patellofemoral arthritis, (ii) ACL deficiency vs. intact ACL, (iii) age groups ( 80), and (iv) BMI categories ( 40) with worse function, the effect sizes were small and not clinically meaningful. Patellofemoral arthritis and ACL deficiency had no negative functional impact. Therefore, age, BMI, patellofemoral arthritis, and ACL status should not be considered contraindications; instead, broad selection criteria for fixed-bearing UKA are supported.
London et al. (Fri,) studied this question.