Table 1 Interobserver and intraobserver agreement among experts and nonexperts
| Intraobserver agreement | Κ (95% CI) | Agreement |
|---|---|---|
| All endoscopists | 0.648 (0.641–0.656) | Substantial |
| Experts | 0.611 (0.498–0.709) | Substantial |
| Trainees | 0.516 (0.410–0.636) | Substantial |
| Interbserver agreement | ||
| All endoscopists | 0.567 (0.470–0.675) | Moderate |
| Experts | 0.651 (0.586–0.715) | Substantial |
| Trainees | 0.646 (0.615–0.677) | Moderate |