Table 4.
Individual ratings and Kappa statistic for the agreement of necrosis depth (SKIN score) for primary clinical, secondary clinical and photographic 1 and 2 raters
| Primary clinical | Secondary clinical | Kappa [95% CI] | Kappa interpretation | |||
| None | Colour change | Partial thickness | Full thickness | |||
| None | 49 | 2 | 0 | 0 | ||
| Colour change | 4 | 14 | 1 | 1 | ||
| Partial thickness | 0 | 1 | 8 | 0 | Substantial agreement | |
| Full thickness | 0 | 0 | 0 | 1 | 0.79 [0.58 to 0.99] | |
| Primary clinical | Photographic 1 | |||||
| None | Colour change | Partial thickness | Full thickness | |||
| None | 16 | 2 | 1 | 0 | ||
| Colour change | 3 | 4 | 3 | 0 | ||
| Partial thickness | 0 | 0 | 5 | 1 | Moderate agreement | |
| Full thickness | 0 | 0 | 0 | 0 | 0.53 [0.26 to 0.80] | |
| Primary clinical | Photographic 2 | |||||
| None | Colour change | Partial thickness | Full thickness | |||
| None | 17 | 1 | 1 | 0 | ||
| Colour change | 5 | 3 | 2 | 0 | ||
| Partial thickness | 0 | 2 | 3 | 1 | Fair agreement | |
| Full thickness | 0 | 0 | 0 | 0 | 0.40 [0.12 to 0.69] | |
| Photographic 1 | Photographic 2 | |||||
| None | Colour change | Partial thickness | Full thickness | |||
| None | 30 | 0 | 1 | 0 | ||
| Colour change | 6 | 6 | 2 | 0 | ||
| Partial thickness | 2 | 4 | 4 | 0 | Moderate agreement | |
| Full thickness | 0 | 0 | 3 | 2 | 0.50 [0.29 to 0.71] | |