Kappa scores (95% confidence interval) for experts and non-experts, for each diagnostic category and overall, using the second round rectal biopsy alone and the full colonoscopic series
| Experts (rectal) | Non-experts (rectal) | Experts (full series) | Non-experts (full series) | |
|---|---|---|---|---|
| *No diagnosis made in this category. | ||||
| Crohn’s disease | 0.18 (−0.01 to 0.38) | 018 (−0.01 to 0.38) | 0.43 (0.32 to 0.53) | 0.38 (0.28 to 0.49) |
| Ulcerative colitis | 0.56 (0.45 to 0.67) | 0.39 (0.30 to 0.48) | 0.64 (0.55 to 0.74) | 0.53 (0.44 to 0.63) |
| Indeterminate | 0.09 (0.03 to 0.15) | 0.06 (0.01 to 0.11) | 0.07 (0.02 to 0.11) | −0.03 (−0.12 to 0.05) |
| Normal | 0.57 (0.45 to 0.69) | 0.55 (0.45 to 0.64) | 0.47 (0.24 to 0.71) | 0.49 (0.26 to 0.73) |
| Infective | 0.21 (−0.02 to 0.43) | 0.11 (0.04 to 0.18) | 0.28 (0.06 to 0.50) | 0.14 (0.03 to 0.25) |
| Collagenous | 0.52 (0.14 to 0.90) | 0.41 (0.10 to 0.73) | 0.57 (0.24 to 0.90) | 0.43 (0.20 to 0.66) |
| Graft versus host | 0.05 (0.02 to 0.08) | 0.02 (−0.02 to 0.07) | 0.19 (0.03 to 0.34) | 0.15 (0.04 to 0.25) |
| Tuberculosis | 0.04 (0.02 to 0.06) | * | −0.02 (−0.08 to 0.05) | * |
| Overall | 0.35 (0.29 to 0.42) | 0.29 (0.24 to 0.34) | 0.43 (0.36 to 0.51) | 0.39 (0.32 to 0.45) |