The Dutch version of the knee injury and osteoarthritis outcome score: A validation study

Table 2 Internal consistency of the KOOS subscales, expressed by Cronbach's alpha

KOOS subscales	Mild OA	Moderate OA	Severe OA	TKA	Revision of TKA
Pain (9 items)	0.94	0.93	0.80	0.92	0.87
Symptoms (7 items)	0.71	0.83	0.56	0.74	0.78
ADL (17 items)	0.78	0.97	0.94	0.94	0.93
Sport/Recreation (5 items)	0.87	0.95	0.98	0.88	0.95
QoL (4 items)	0.81	0.85	0.73	0.81	0.90

Abbreviations: OA; osteoarthritis, TKA; total knee arthroplasty, Revision of TKA; Revision of total knee arthroplasty, ADL, Activities of daily living; QoL; Quality of life.

ISSN: 1477-7525