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Subject of the scale: Hip - knee |
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Download / Print :
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This is a Swedish self-assessment questionnaire published in 1998 (Roos et al. 1998) which evaluates the patient's opinion about his knee and the associated problems. The KOOS assesses the consequences of the knee injury in both the short and the long term, and the consequences of gonarthrosis.
It contains 42 items divided into five sub-sub-scales:
KOOS Pain, KOOS Symptoms, Function in daily living (KOOS ADL), Sport (KOOS Sport) and Knee related quality of life (KOOS QOL). The total scores can vary from 0 to 100.
> Access to the scale is free.
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Validity |
Face validity |
[3] |
Content validity |
[3] |
Criterion validity
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Concurrent validity
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Predictive validity |
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Construct validity
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Convergent validity
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[5] |
Divergent validity
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Discriminant validity
(sensitivity and distinctiveness) |
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Reliability |
Intra-rater reliability |
[5] |
Inter-rater reliability |
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Test-retest |
[2] |
Internal consistency (alpha) |
[2] [5] |
Responsiveness
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[6] |
General comment on reliability:
The construct validity has been assessed in a manner open to dispute, since it was only compared to the SF36 [1].
The advantage of this scale is that it is a self-assessment questionnaire.
However its slightly complicated method of calculation, the absence of assurance of a correct construct validity, and the absence of comparison with the scales traditionally used could be criticised.
Reference update:
To notify us of a missing reference, please use:
contact@scale-library.com
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For more details of the scale, the comments or the psychometric properties presented here, please contact
Dr. Olivier UCAY : |
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Inaugural references: [1] Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther. août 1998;28(2):88 96
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Psychometric references: [2] Roos EM, Toksvig-Larsen S: Knee injury and Osteoarthritis Outcome Score (KOOS) - validation and comparison to the WOMAC in total knee replacement. Health Qual Life Outcomes 2003, 1:17
[3] Collins, N. J., D. Misra, et al. (2011). "Measures of knee function: International Knee Documentation Committee (IKDC) Subjective Knee Evaluation Form, Knee Injury and Osteoarthritis Outcome Score (KOOS), Knee Injury and Osteoarthritis Outcome Score Physical Function Short Form (KOOS-PS), Knee Outcome Survey Activities of Daily Living Scale (KOS-ADL), Lysholm Knee Scoring Scale, Oxford Knee Score (OKS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Activity Rating Scale (ARS), and Tegner Activity Score (TAS)." Arthritis care & research 63 Suppl 11: S208-228.
[4] Tanner, S. M., K. N. Dainty, et al. (2007). "Knee-specific quality-of-life instruments: which ones measure symptoms and disabilities most important to patients?" Am J Sports Med 35(9): 1450-1458.
[5] Salavati, M., B. Akhbari, et al. (2011). "Knee injury and Osteoarthritis Outcome Score (KOOS); reliability and validity in competitive athletes after anterior cruciate ligament reconstruction." Osteoarthritis and cartilage / OARS, Osteoarthritis Research Society 19(4): 406-410
[6] Collins, N. J. and E. M. Roos (2012). "Patient-reported outcomes for total hip and knee arthroplasty: commonly used instruments and attributes of a "good" measure." Clinics in geriatric medicine 28(3): 367-394.
[8] Irrgang JJ, Anderson AF, Boland AL, Harner CD, Kurosaka M, Neyret P, et al. Development and validation of the international knee documentation committee subjective knee form. Am J Sports Med. oct 2001;29(5):600 13.
[9] Irrgang JJ, Anderson AF, Boland AL, Harner CD, Neyret P, Richmond JC, et al. Responsiveness of the International Knee Documentation Committee Subjective Knee Form. Am J Sports Med. oct 2006;34(10):1567 73
[10] Roos, E. M. and S. Toksvig-Larsen (2003). "Knee injury and Osteoarthritis Outcome Score (KOOS) - validation and comparison to the WOMAC in total knee replacement." Health Qual Life Outcomes 1(1): 1
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