Evaluation of Oxford instability shoulder score, Western Ontario shoulder instability Index and Euroqol in patients with slap (superior labral anterior posterior) lesions or recurrent anterior dislocations of the shoulder

Table 2 Agreement and reliability statistics - total scores

	1.test Mean (SD)	2.test Mean (SD)	Mean difference (95% CI)	Limits of agreement (LoA)	Minimal detectable change (95% CI)	ICC (2.1) (95% CI)^†	Standard error of measurement (SEM_agreement)	Chronbach’s alpha
OISS (12to 60)	35.7 (9.1)	35.4 (8.9)	0.3 (−0.7 to 1.2)	(−7.8 to 8.4)	8.1 (5.4 to 10.8)	0.90 (0.84 to 0.94)	2.9	0.95
WOSI (0 to 2100)	1055.7 (407.8)	1050.3 (444.6)	5.4 (−35.6 to 36.4)	(−333.9 to 344.8)	339.3 (227.0 to 451.8)	0.92 (0.87 to 0.95)	122.4	0.96
EQ-5D (−0.53 to 1)	0.70 (.24)	0.71 (0.24)	−0.01 (−0.06 to 0.04)	(−0.4 to 0.4)	0.4 (0.3 to 0.5)	0.66 (0.50 to 0.77)	0.1	0.79
EQ-VAS (0 to 100)	71.9 (18.1)	72.3 (18.7)	−0.42 (−2.4 to 1.6)	(−17.1 to 16.2)	16.6 (11.2 to 22.2)	0.89 (0.83 to 0.93)	6.0	0.94

SD standard deviation, ICC (2.1) interclass correlation version 2.1 for measuring correlation between test and retest. Agreement estimated by the difference between test and retest, the limits of agreement (LoA), the standard error of measurement (SEM_agreement), and minimal detectable change (MDC) with 95% confidence interval. Chronbach’s alpha (internal consistency) are given for the 2.test. 95% CI (confidence interval) for paired t-test under null hypothesis = no difference between test and retest score.
† P< .0001 for all ICC (interclass correlation coefficient version 2.1).

ISSN: 1756-0500