The relationship between Knee Injury and Osteoarthritis Outcome Score (KOOS) and Timed Up and Go test in patients with symptomatic knee osteoarthritis

Both self-reported and physical performance tests are used as outcome measures in knee osteoarthritis (OA). The aim of this study is to investigate the relationship between Knee Injury and Osteoarthritis Outcome Score (KOOS) and Timed Up and Go (TUG) test in the patients with symptomatic knee OA. Eighty-nine patients with symptomatic knee OA who admitted to the outpatient clinic of the hospital were included in the study. All patients had bilateral medial tibiofemoral knee OA. After physical examination, radiological severity of the disease was evaluated with Kellgren–Lawrence scale. All patients completed KOOS that is a knee-related disorder-specific questionnaire. TUG test was used for the evaluation of performance-based functional status. Seventy-seven patients (84.5 %) were female. Mean age was 62.9 ± 9.5 (50–85) years, and body mass index was 32.10 ± 4.39 kg/m². Mean symptom duration was 7.08 ± 6.52 years. Mean radiological stage was 3.22 ± 0.69. There was a statistically significant negative correlation between all of the KOOS domains and TUG (p < 0.01). As a result of this study, a moderate relationship was found between the all KOOS dimensions and TUG in knee OA.