Table 9.

Comparison of test-retest reliability and internal consistency

KSS domain	Korean		Dutch		Japanese		French
	ICC	CA	ICC	CA	ICC	CA	ICC	CA
Symptoms (3 items)/25 points	0.85	0.92	0.92	0.96	0.65	0.78	0.97	0.70
Satisfaction score (5 items)/40 points	0.81	0.89	0.73	0.84	0.88	0.94	0.84	0.90
Expectation score (3 items)/15 points	0.80	0.89	0.84	0.91	0.83	0.91	0.87	0.80
Activity (19 items)/100 points	0.81	0.90	0.87	0.93	NA	NA	0.94	0.80
Total score/180 points	0.86	0.93	0.82	0.93	NA	NA	0.96	0.80

KSS = Knee Society Score; ICC = intraclass correlation coefficient; CA = Cronbach’s alpha; NA = not available.