Table 6

Psychometric properties of the IKDC-SKF and the KOOS126

IKDC-SKFKOOS
PASS75.9Pain=88.9
Symptoms=57.1
ADL=100
Sport=75.0
QoL=62.5
MCID11.5N/A
MIC10.9Pain=2.5
Symptoms=−1.2
ADL=2.4
Sport=12.1
QoL=18.3
MDC11.5Pain=6.0 to 6.1
Symptoms=5.0 to 8.5
ADL=7.0 to 8.0
Sport=5.8 to 12.0
QoL=7.0 to 7.2
Content validityPoorNo evidence
Structural validityNo evidenceNo evidence
Internal consistency0.77 to 0.97Pain=0.84 to 0.91
Symptoms=0.25 to 0.75
ADL=0.94 to 0.96
Sport=0.85 to 0.89
QoL=0.64 to 0.9
Measurement error3.2 to 5.6Pain=2.2 to 10.1
Symptoms=3.1 to 9.0
ADL=2.9 to 11.7
Sport=2.1 to 24.6
QoL=2.6 to 10.8
Test re-test reliability0.85 to 0.99Pain=0.85 to 0.93
Symptoms=0.83 to 0.95
ADL=0.75 to 0.91
Sport=0.61 to 0.89
QoL=0.83 to 0.95
ResponsivenessGoodPoor
Cross-cultural validityFairNo evidence
  • ADL, activities of daily living; IKDC-SKF, International Knee Documentation Committee Subjective Knee Form; KOOS, Knee injury and Osteoarthritis Outcome Score; MCID, minimal clinically important difference; MDC, minimum detectable change; MIC, minimally important change; N/A, Not available; PASS, patient acceptable symptom state; QoL, quality of life.