Table 1.

The interrater reliability for diagnosis and each of the categorical variables of stranding, nodularity, and size.

Measure	Kappa estimate	95% CI	Raw proportion of matching responses
Diagnosis	0.63	(0.61, 0.65)	0.82
Stranding	0.17	(0.14, 0.19)	0.76
Nodularity	0.41	(0.39, 0.43)	0.72
Size	0.11	(0.09, 0.13)	0.68