Table 4.

Reliability and Validity of the KOOS function, recreation and sport scale and KOOS-PS Short Form

Study	N	Population description	Internal consistency: Cronbach’s alpha	Test-retest reliability: ICC	Comparator	Correlation
KOOS function, recreation and sport scale
Xie et al 200622	127	People from Singapore, China with knee OA scheduled for TKA	> 0.7	0.7	SF-36 Physical Functioning	r = 0.5
de Groot et al 200823	262	People from the Netherlands with knee OA or TKA	> 0.9	> 0.5	SF-36 Physical Functioning	r = 0.1–0.6
Ornetti et al 200825	67	People from France with knee OA or awaiting TKR	0.8	0.8	Osteoarthritis knee and hip quality of life questionnaire	r = 0.3
Goncalves et al 200924	223	People from Portugal with symptomatic knee OA	0.9	0.9	SF-36 Physical Functioning	r = 0.6
Paradowski et al 201548	68	People from Poland awaiting TKR	0.9	0.9	SF-36 Physical Functioning	r = 0.4
KOOS-PS Short Form
Ornetti et al 200949	87	People from France with knee OA		0.9	Osteoarthritis knee and hip quality of life questionnaire	r = −0.4
Goncalves et al 201026	85	People from Portugal with symptomatic knee OA	0.9	0.9
Davis et al 2009	248	People from Canada 6 months after TKR	0.9		WOMAC Physical Function	r = 0.9
Gul et al 201350		People from Turkey with symptomatic knee OA	0.9	0.8	WOMAC Physical Function	r = 0.8
Singh et al 201451	138	People from the US with knee OA		0.7