Table 1.
Summary of reliability data*
| Patient cohort evaluated (ref.) | Internal consistency (Cronbach’s α) | Test–retest (ICC) | MDC | SEM | |
|---|---|---|---|---|---|
| Function measures | |||||
| IKDC | Knee injuries (ACL, meniscal, chondral) (15,20,23) | 0.77–0.91 | 0.90–0.95† | 8.8–15.6† | 3.2–5.6† |
| Cohort of mixed knee pathologies (11,16–18,21) | 0.92–0.97 | 0.87–0.99† | 6.7 | 2.4–4.6† | |
| KOOS | Knee injuries (25,27,32,36) | Pain: 0.84–0.91 Symptoms: 0.25–0.75 ADL: 0.94–0.96 Sport/rec: 0.85–0.89 QOL: 0.64–0.9 |
Pain: 0.85–0.93 Symptoms: 0.83–0.95 ADL: 0.75–0.91 Sport/rec: 0.61–0.89 QOL: 0.83–0.95 |
Pain: 6–6.1 Symptoms: 5–8.5 ADL: 7–8 Sport/rec: 5.8–12 QOL: 7–7.2 |
Pain: 2.2 Symptoms: 3.1 ADL: 2.9 Sport/rec: 2.1 QOL: 2.6 |
| Knee OA (28–31,33) | Pain: 0.65–0.94 Symptoms: 0.56–0.83 ADL: 0.78–0.97 Sport/rec: 0.84–0.98 QOL: 0.71–0.85 |
Pain: 0.8–0.97 Symptoms: 0.74–0.94 ADL: 0.84–0.94 Sport/rec: 0.65–0.92 QOL: 0.6–0.91 |
Pain: 13.4 Symptoms: 15.5 ADL: 15.4 Sport/rec: 19.6 QOL: 21.1 |
Pain: 7.2–10.1 Symptoms: 7.2–9 ADL: 5.2–11.7 Sport/rec: 9–24.6 QOL: 7.4–10.8 |
|
| KOOS-PS | Knee OA (40–42) | 0.89 | 0.85–0.86 | – | – |
| KOS-ADL | Mixed knee pathologies (43,47,49–52) | 0.89–0.98 | 0.94–0.98 | 11.4 | 4.1 |
| Lysholm Knee Scoring Scale | Knee injuries (ACL, meniscal, chondral; patellar dislocation) (54,55,61,63,64) | 0.65–0.73 | 0.88–0.97 | 8.9–10.1 | 3.2–3.6 |
| Mixed knee pathologies (43,47,119,120) | 0.60–0.73 | 0.68–0.95 | – | 9.7–12.5† | |
| OKS | Knee OA (46,66,71,121) | 0.87–0.93 | 0.91–0.94 | 6.1 | 2.2 |
| WOMAC | Chondral defects (23) | Pain: 0.81–0.85 Symptoms: 0.75–0.86 Function: 0.86–0.93 |
Pain: 14.4–16.2 Symptoms: 22.9–30.6 Function: 10.6–15 |
Pain: 5.2–5.8 Symptoms: 8.3–11.1 Function: 3.8–5.4 |
|
| Knee OA (42,46,91,92, 94–98,100,101,103–105,108,122,123) | Pain: 0.67–0.92 Symptoms: 0.7–0.94 Function: 0.82–0.98 |
Pain: 0.65–0.98 Symptoms: 0.52–0.89 Function: 0.71–0.96 |
Pain: 18.8–22.4 Symptoms: 27.1–29.1 Function: 13.1–13.3 |
Pain: 6.8–8.1 Symptoms: 9.8–10.5 Function: 4.7–4.8 |
|
| Activity measures | |||||
| ARS | Baseline knee athletic activity for cohort of mixed knee pathologies (113) | – | 0.97 | – | – |
| TAS | Knee injuries (ACL, meniscal patellar dislocation) (55,61,64) | n/a | 0.82–0.92† | 1.0 | 0.4–0.64 |
| Knee OA (117) | n/a | 0.84 | – | – | |
ICC = intraclass correlation coefficient; MDC = minimal detectable change; SEM = standard error of measurement; IKDC = International Knee Documentation Committee Subjective Knee Evaluation Form; ACL = anterior cruciate ligament; KOOS = Knee Injury and Osteoarthritis Outcome Score; ADL = activities of daily living; sport/rec = sport/recreation; QOL = quality of life; OA = osteoarthritis; KOOS-PS = Knee Injury and Osteoarthritis Outcome Score Physical Function Short Form; KOS-ADL = Knee Outcome Survey Activities of Daily Living Scale; OKS = Oxford Knee Score; WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index; ARS = Activity Rating Scale; TAS = Tegner Activity Scale; n/a = not applicable.
Large variation in time between test—retest (up to 12 months).