Table 2.
Subgroup analysis for true positives and false negatives according to the polyp size, morphology, and histology in validation dataset A.
| Polyp characteristics | Total number of frames with polyps | True positive, number (%) | False negative, number (%) | |
|---|---|---|---|---|
| Size | <1 cm | 985 | 961 (97.6) | 24 (2.4) |
| ≥1 cm | 364 | 346 (95.1) | 18 (4.9) | |
| Morphology* | I | 1152 | 1129 (98.0) | 23 (2.0) |
| II | 157 | 141 (89.8) | 16 (10.2) | |
| Laterally spreading tumor | 40 | 37 (92.5) | 3 (7.5) | |
| Histology | Tubular adenoma | 998 | 974 (97.6) | 24 (2.4) |
| Hyperplastic polyp | 143 | 137 (95.8) | 6 (4.2) | |
| Sessile serrated polyp | 180 | 169 (93.9) | 11 (6.1) | |
| Cancer | 28 | 28 (100) | 0 (0.0) | |
*Morphology was classified according to the Paris classification.