Characteristics | Model development cohort | Validation cohort | |
---|---|---|---|
Training set, n = 151, (%) | Test set, n = 151, (%) | Validation set, n = 130, (%) | |
Age (years) | |||
 < 60 | 85 (56.3) | 78 (51.7) | 76 (58.5) |
 ≥ 60 | 66 (43.7) | 73 (48.3) | 54 (41.5) |
Gender | |||
Male | 88 (58.3) | 93 (61.6) | 81 (62.3) |
Female | 63 (41.7) | 58 (38.4) | 49 (37.7) |
Tumor location | |||
Upper | 18 (11.9) | 21 (13.9) | 21 (16.2) |
Middle | 21 (13.9) | 29 (19.2) | 26 (20.0) |
Low | 112 (74.2) | 101 (66.9) | 83 (63.8) |
Tumor size (mm) | |||
 ≤ 20 | 86 (56.9) | 91 (60.3) | 67 (51.5) |
 > 20 | 65 (43.1) | 60 (39.7) | 63 (48.5) |
Differentiation | |||
Differentiated | 40 (26.5) | 51 (33.8) | 43 (33.1) |
Undifferentiated | 111 (73.5) | 100 (66.2) | 87 (66.9) |
Invasional depth | |||
Mucosa | 67 (44.4) | 77 (51.0) | 46 (35.4) |
Submucosa | 84 (55.6) | 74 (49.0) | 84 (64.6) |
LVI | |||
Presence | 19 (12.6) | 19 (12.6) | 18 (13.8) |
Absence | 132 (87.4) | 132 (87.4) | 112 (86.2) |
Ulceration | |||
Presence | 52 (34.4) | 56 (37.1) | 36 (27.7) |
Absence | 99 (65.6) | 95 (62.9) | 94 (72.3) |
LNM | |||
LNM+ | 36 (23.8) | 36 (23.8) | 32 (24.6) |
LNM− | 115 (76.2) | 115 (76.2) | 98 (75.4) |