Author/Authors :
AUNAN, Eirik Departments of 1 Surgery and 2 Physiotherapy, Sykehuset Innlandet, Lillehammer , NÆSS, Grethe Departments of 1 Surgery and 2 Physiotherapy, Sykehuset Innlandet, Lillehammer , CLARKE-JENSSEN, John Departments of 1 Surgery and 2 Physiotherapy, Sykehuset Innlandet, Lillehammer , SANDVIK, Leiv Center for Biostatistics and Epidemiology - Oslo University Hospital, Oslo, Norway , KIBSGÅRD, Thomas Johan Departments of 1 Surgery and 2 Physiotherapy, Sykehuset Innlandet, Lillehammer
Abstract :
Background and purpose — Recent research on outcomes after total knee arthroplasty (TKA) has raised the question of the abil-ity of traditional outcome measures to distinguish between treat-ments. We compared functional outcomes in patients undergoing TKA with and without patellar resurfacing, using the knee injury and osteoarthritis outcome score (KOOS) as the primary outcome and 3 traditional outcome measures as secondary outcomes.Patients and methods — 129 knees in 115 patients (mean age 70 (42–82) years; 67 female) were evaluated in this single-center, randomized, double-blind study. Data were recorded preopera-tively, at 1 year, and at 3 years, and were assessed using repeated-measures mixed models. Results — The mean subscores for the KOOS after surgery were statistically significantly in favor of patellar resurfacing: sport/recreation, knee-related quality of life, pain, and symptoms. No statistically significant differences between the groups were observed with the Knee Society clinical rating system, with the Oxford knee score, and with visual analog scale (VAS) for patient satisfaction.Interpretation — In the present study, the KOOS—but no other outcome measure used—indicated that patellar resurfacing may be beneficial in TKA.
