Table 2 The basic characteristics of the lesions in training and validation cohorts
Characteristic | Total (n = 1056) | Cohort | P-value | ||
|---|---|---|---|---|---|
Training Cohort (n = 406) | Internal Validation Cohort (n = 498) | External Validation Cohort (n = 152) | |||
Lesion Morphology, n (%) | |||||
Protruding | 433 (41.00) | 165 (40.64) | 200 (40.16) | 68 (44.73) | 0.180 |
Flat elevated | 420 (39.77) | 166 (40.89) | 191 (38.35) | 63 (41.45) | |
Depressed | 13 (1.23) | 6 (1.48) | 6 (1.20) | 1 (0.66) | |
LST-NG | 47 (4.45) | 9 (2.22) | 32 (6.43) | 6 (3.95) | |
LST-G | 16 (1.52) | 8 (1.97) | 7 (1.41) | 1 (0.66) | |
Advanced-type | 127 (12.03) | 52 (12.80) | 62 (12.45) | 13 (8.55) | |
Lesion Location, n (%) | 0.112 | ||||
Cecum | 47 (4.45) | 20 (4.93) | 22 (4.42) | 5 (3.29) | |
Ascending Colon | 153 (14.49) | 65 (16.01) | 62 (12.45) | 26 (17.11) | |
Transverse Colon | 277 (26.23) | 106 (26.11) | 124 (24.90) | 47 (30.92) | |
Descending Colon | 90 (8.52) | 25 (6.16) | 52 (10.44) | 13 (8.55) | |
Sigmoid Colon | 255 (24.15) | 110 (27.09) | 115 (23.09) | 30 (19.74) | |
Rectum | 234 (22.16) | 80 (19.70) | 123 (24.70) | 31 (20.39) | |
Lesion Size, M (Q1, Q3) | 0.70 (0.50, 1.20) | 0.70 (0.50, 1.20) | 0.70 (0.50, 1.50) | 0.60 (0.50, 1.00) | 0.008 |
