Table 2. Rate of agreement among surgeons and accordance of ratings with radiographs (mild Madelung versus normal).

	Fleiss' kappa (95% CI)	Average pairwise agreement (%)	Average accuracy
All radiographs	0.12 (0.04–0.20)	74.74	0.75 (0.26)
Madelung: Yes	0.08 (−0.01 to 0.17)	61.47	0.30 (0.16)
Madelung: No	0.10 (−0.00 to 0.21)	78.06	0.86 (0.12)

Abbreviation: CI, confidence interval.