Table 5.

Interobserver kappa values with 95% confidence interval comparing the raters at the two classification seminars

	Interobserver agreement
	Rater 1 vs Rater 2		Rater 1 vs Rater 3		Rater 2 vs Rater 3
	Seminar 1	Seminar 2	Seminar 1	Seminar 2	Seminar 1	Seminar 2
AO/OTA group (4 signs)	0.64 (0.55–0.73)	0.72 (0.64–0.81)	0.76 (0.68–0.84)	0.73 (0.64–0.81)	0.65 (0.56–0.74)	0.69 (0.60–0.78)
AO/OTA type (3 signs)	0.76 (0.68–0.85)	0.83 (0.75–0.90)	0.85 (0.78–0.92)	0.81 (0.73–0.89)	0.78 (0.69–0.86)	0.80 (0.72–0.88)