Multivariate regression analyses of the association between the Knee Injury and Osteoarthritis Outcome Score subscales, the Anterior Knee Pain Scale and functional tasks with patellofemoral and tibiofemoral OA severity (grade 0–3)
Dependent variable | Independent variable | β | B | 95% CI of B | p Value |
---|---|---|---|---|---|
KOOS-pain | Patellofemoral OA | −0.3 | −3.6 | −7.0 to −0.1 | 0.042 |
Tibiofemoral OA | −0.3 | −3.8 | −7.3 to −0.2 | 0.037 | |
KOOS-symptoms | Patellofemoral OA | −0.4 | −7.0 | −12.3 to −1.7 | 0.011 |
Tibiofemoral OA | −0.2 | −3.2 | −8.6 to 2.3 | 0.251 | |
KOOS-ADL | Patellofemoral OA | −0.2 | −3.5 | −9.9 to 2.8 | 0.268 |
Tibiofemoral OA | 0.0 | 0.6 | −5.9 to 7.1 | 0.850 | |
KOOS-SR | Patellofemoral OA | −0.2 | −3.2 | −9.0 to 2.7 | 0.281 |
Tibiofemoral OA | −0.3 | −5.8 | −11.8 to 0.2 | 0.058 | |
KOOS-QOL | Patellofemoral OA | −0.5 | −13.0 | −20.3 to −5.8 | 0.001 |
Tibiofemoral OA | −0.2 | −5.8 | −13.2 to 1.6 | 0.124 | |
AKPS | Patellofemoral OA | −0.5 | −8.0 | −12.8 to −3.3 | 0.001 |
Tibiofemoral OA | −0.1 | −1.8 | −6.6 to 3.1 | 0.468 | |
Hop for distance* | Patellofemoral OA | −0.3 | −13.6 | −23.6 to −3.5 | 0.009 |
Tibiofemoral OA | −0.2 | −7.9 | −18.0 to 2.2 | 0.123 | |
Side hop* | Patellofemoral OA | −0.4 | −6.5 | −10.1 to −3.0 | 0.001 |
Tibiofemoral OA | −0.1 | −2.0 | −5.6 to 1.6 | 0.260 | |
One-leg rise† | Patellofemoral OA | −0.3 | −6.3 | −11.8 to −0.8 | 0.026 |
Tibiofemoral OA | 0.0 | 0.1 | −5.6 to 5.7 | 0.980 |
N=60 for patient-reported outcomes, N=65 for functional tasks.
*Adjusted for height, age and gender.
†adjusted for weight.
β, standardised regression coefficient; ADL, function in activities of daily living; AKPS, Anterior Knee Pain Scale; B, unstandardised regression coefficient; KOOS, Knee Injury and Osteoarthritis Outcome Score; OA, osteoarthritis; QOL, quality of life; SR, function in sport and recreation.