Number* and percentage (in parenthesis) of patients with Crohn’s disease and ulcerative colitis (UC) correctly diagnosed by 13 experts and 12 non-experts on the rectal biopsies and full series in rounds 1 and 2
| Crohn’s disease | UC | |||
|---|---|---|---|---|
| Experts | Non-experts | Experts | Non-experts | |
| *Although there were 19 cases of CD and 24 of UC, not all cases were viewed by all pathologists; missing values are shown in square brackets. The results are presented as a percentage of the total diagnoses available for each category. If all cases had been viewed, for CD n=247 (experts) and 228 (non-experts). If all UC cases had been viewed n=312 (experts) and 288 (non-experts). | ||||
| Round 1 | ||||
| Rectal | 39 (17) [18] | 31 (14) [10] | 190 (65) [21] | 170 (62) [15] |
| Overall | 70 (16) | 360 (64) | ||
| Full series | 130 (56) [15] | 109 (50) [10] | 213 (74) [24] | 195 (72) [16] |
| Overall | 239 (53) | 408 (73) | ||
| Round 2 | ||||
| Rectal | 58 (24) [8] | 26 (12) [7] | 195 (66) [15] | 170 (62) [14] |
| Overall | 84 (18) | 365 (64) | ||
| Full series | 152 (64) [9] | 131 (60) [10] | 212 (73) [22] | 203 (76) [20] |
| Overall | 283(62) | 415 (74) | ||