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Table 2 Test-retest reliability of the Pedi-IKDC and KOOS-Child subscales (n = 59)

From: Pedi-IKDC or KOOS-child: which questionnaire should be used in children with knee disorders?

  Mean score T0 (SD) Mean score T1 (SD) Mean difference (SD) ICC 95% CI SEM SDC
Pedi-IKDC 54.5 (19.7) 55.4 (20.0) 0.9 (12.1) 0.9 0.8 to 0.9 8.6 23.8
KOOS-Child Symptoms 68.2 (22.8) 70.3 (19.8) 2.1 (14.5) 0.9 0.8 to 0.9 10.2 28.4
KOOS-Child Pain 62.0 (23.8) 63.1 (23.1) 1.1 (13.9) 0.9 0.8 to 1.0 9.9 27.3
KOOS-Child ADL 77.8 (21.1) 78.0 (22.5) 0.2 (12.6) 0.9 0.8 to 1.0 8.9 24.7
KOOS-Child Sport/play 41.6 (30.3) 46.6 (30.9) 5.0 (23.9) 0.8 0.7 to 0.9 16.9 46.9
KOOS-Child QOL 47.9 (22.1) 47.3 (24.0) 0.6 (14.9) 0.9 0.8 to 0.9 10.5 29.2
  1. n number of patients, SD Standard Deviation, ICC Intraclass Correlation Coefficient, CI Confidence Interval, SEM Standard Error of the Mean, SDC Smallest Detectable Change, IKDC The International Knee Documentation Committee Subjective Knee Form, KOOS Knee injury and Osteoarthritis Outcome Score, ADL Activities of Daily Living, QOL Quality Of Life