Table 1 Comparison of traditional features of patients in the training and testing sets
Traditional features | Overall (n = 240) | Training set (n = 168) | Testing set (n = 72) | x2 value | p value |
|---|---|---|---|---|---|
Gender | 2.611 | 0.106a | |||
Female | 43 (17.9%) | 35 (20.8%) | 8 (11.1%) | ||
Male | 197 (82.1%) | 133 (79.2%) | 64 (88.9%) | ||
Age | < 0.001 | 1.000a | |||
< 60 years old | 103 (42.9%) | 72 (42.9%) | 31 (43.1%) | ||
≥ 60 years old | 137 (57.1%) | 96 (57.1%) | 41 (56.9%) | ||
Tumor range | 1.876 | 0.171a | |||
Single region | 176 (73.3%) | 128 (76.2%) | 48 (66.7%) | ||
Multi-regions | 64 (26.7%) | 40 (23.8%) | 24 (33.3%) | ||
Tumor location | 0.001 | 0.977a | |||
Proximal | 98 (40.8%) | 68 (40.5%) | 30 (41.7%) | ||
Distal | 142 (59.2%) | 100 (59.5%) | 42 (58.3%) | ||
Tumor thickness (cm) | 1.37 [1.04; 1.73] | 1.37 [1.04; 1.67] | 1.37 [1.06; 1.82] | 0.229 | 0.632b |
Forms of tumor enhancement | 3.252 | 0.071a | |||
Uniformity | 123 (51.2%) | 93 (55.4%) | 30 (41.7%) | ||
Inhomogeneous | 117 (48.8%) | 75 (44.6%) | 42 (58.3%) | ||
Degree of tumor enhancement | 0.048 | 0.825a | |||
Not obviously | 66 (27.5%) | 45 (26.8%) | 21 (29.2%) | ||
Obviously | 174 (72.5%) | 123 (73.2%) | 51 (70.8%) | ||
cT staging | 0.238 | 0.626a | |||
Non-cT4 | 60 (25.0%) | 44 (26.2%) | 16 (22.2%) | ||
cT4 | 180 (75.0%) | 124 (73.8%) | 56 (77.8%) | ||
cN staging | 2.979 | 0.084b | |||
Negative | 76 (31.7%) | 47 (28.0%) | 29 (40.3%) | ||
Positive | 164 (68.3%) | 121 (72.0%) | 43 (59.7%) | ||
CEA (μg/L) | 0.094 | 0.758a | |||
≤ 5 | 188 (78.3%) | 133 (79.2%) | 55 (76.4%) | ||
> 5 | 52 (21.7%) | 35 (20.8%) | 17 (23.6%) | ||
CA19-9 (kU/L) | 1.750 | 0.186a | |||
≤ 27 | 200 (83.3%) | 144 (85.7%) | 56 (77.8%) | ||
> 27 | 40 (16.7%) | 24 (14.3%) | 16 (22.2%) | ||
CA72-4 (kU/L) | 0.089 | 0.765a | |||
≤ 6.9 | 199 (82.9%) | 138 (82.1%) | 61 (84.7%) | ||
> 6.9 | 41 (17.1%) | 30 (17.9%) | 11 (15.3%) |