Patient reported outcome measures in anterior cruciate ligament rupture and reconstruction: The significance of outcome score prediction

Table 8 Multiple linear regression analysis of post-operative knee outcome scores (n = 34)

Equation (R2, P value, σE)
KOOS
Tegner = 1.2 + (0.01 × Symp.) - (0.02 × Pain) + (0.04 × ADL) - (0.01 × Sp. & Rec.) + (0.02 × QOL)
(R2 = 0.33, P =0.042, σE = 0.8)
Lysholm = 31.6 + (0.12 × Symp.) + (0.29 × Pain) + (0.28 × ADL) - (0.08 × Sp. & Rec.) + (0.02 × QOL)
(R2 = 0.60, P < 0.001, σE = 7.2)
Cincinnati = 20.9 + (0.12 × Symp.) + (0.14 × Pain) + (0.39 × ADL) - (0.04 × Sp. & Rec.) + (0.09 × QOL)
(R2 = 0.80, P < 0.001, σE = 4.5)
IKDC Subjective = (0.23 × Symp.) - (0.07 × Pain) + (0.69 × ADL) + (0.05 × Sp. & Rec.) + (0.27 × QOL) - 26.5
(R2 = 0.79, P < 0.001, σE = 7.9)
KOS-ADLS = (0.29 × Symp.) + (0.25 × Pain) + (0.42 × ADL) + (0.000009 × Sp. & Rec.) + (0.11 × QOL) – 5.4
(R2 = 0.87, P < 0.001, σE = 5.6)
SF-12
Tegner = 0.8 + (0.04 × PCS) + (0.03 × MCS)
(R2 = 0.30, P = 0.005, σE = 0.8)
Lysholm = 44.4 + (0.70 × PCS) + (0.20 × MCS)
(R2 = 0.52, P < 0.001, σE = 7.5)
Cincinnati = 34.1 + (0.67 × PCS) + (0.24 × MCS)
(R2 = 0.65, P < 0.001, σE = 5.6)
IKDC Subjective = (1.07 × PCS) + (0.58 × MCS) - 18.8
(R2 = 0.68, P < 0.001, σE = 9.2)
KOS-ADLS = 7.9 + (0.97 × PCS) + (0.51 × MCS)
(R2 = 0.65, P < 0.001, σE = 8.8)

R²: Regression coefficient; σ_E: Root mean squared error. IKDC: International Knee Documentation Committee; Sub: Subjective knee score; KOS-ADLS: Knee Outcome Survey - Activities of Daily Living Scale; SF-12: Short Form - 12 Item Health Survey; PCS: Physical component summary; MCS: Mental component scores; KOOS: Knee Injury and Osteoarthritis Outcome Score; ADL: Activities of daily living; QOL: Quality of life.