Table 3.

Individual ratings and Kappa statistic for the agreement of necrosis (yes/no) for primary clinical, secondary clinical and photographic 1 and 2 raters

Primary clinical	Secondary clinical		Kappa [95% CI]	Kappa interpretation
	No	Yes
No	49	2		Almost perfect agreement
Yes	4	26	0.84 [0.62 to 1.00]
Primary clinical	Photographic 1
	No	Yes
No	16	3		Substantial agreement
Yes	3	13	0.65 [0.32 to 0.99]
Primary clinical	Photographic 2
	No	Yes
No	17	2		Moderate agreement
Yes	5	11	0.59 [0.26 to 0.92]
Photographic 1	Photographic 2
	No	Yes
No	30	1		Substantial agreement
Yes	8	21	0.70 [0.45 to 0.94]