Table 6.

Intra-observer kappa values with upper and lower confidence interval (CI) for proximal humerus fractures, calculated with or without taking “related” fractures into account (intermediate groups)

	Without intermediate groups		With intermediate groups
	Mean kappa value	95% CI	Mean kappa value	95% CI
Rater 1	0.752	0.652 – 0.853	0.974	0.939 – 1.000
Rater 2	0.599	0.481 – 0.717	0.910	0.846 – 0.974
Rater 3	0.593	0.478 – 0.707	0.914	0.853 – 0.975