Table VII.

Interobserver and intraobserver reliability of Beck classification for labral tears

	Interobserver agreement			Intraobserver agreement
Variable	AC (SE)	Kappa (SE)	Proportion agreement (SE)	AC (SE)	Kappa (SE)	Proportion agreement (SE)
Labral tear Beck classificationa	0.745 (0.078)	0.208 (0.301)	0.900 (0.030)	0.562 (0.103)	0.234 (0.160)	0.811 (0.040)
Clock face labral tear (yes/no)
1 o′clock	0.876 (0.143)	−0.059 (0.026)	0.889 (0.120)	0.929 (0.053)	−0.034 (0.025)	0.933 (0.046)
2 o′clock	0.876 (0.143)	−0.059 (0.026)	0.889 (0.120)	N/A	N/A	1 (0)
3 o′clock	−0.229 (0.758)	−0.260 (0.437)	0.378 (0.322)	0.412 (0.181)	−0.250 (0.071)	0.600 (0.091)
4–10 o′clock	N/A	N/A	1 (0)	N/A	N/A	1 (0)
11 o′clock	0.901 (0.074)	0.153 (0.374)	0.911 (0.061)	0.890 (0.068)	−0.053 (0.031)	0.900 (0.056)
12 o′clock	0.199 (0.336)	0.016 (0.252)	0.556 (0.147)	−0.245 (0.211)	−0.435 (0.141)	0.333 (0.088)

Agreement measures are shown as point estimate (standard error). N/A is indicated when all observers rated the variable as ‘No’ or ‘Normal’.

^aWeighted agreement measure.