Table 1 The distributions of demographic and clinicopathologic characteristics of colorectal cancer patients in the three groups
Development group | Internal validation group | External validation group | P | |
|---|---|---|---|---|
Age (years) | 0.845# | |||
Mean | 63.55 | 62.78 | 62.34 | |
SD | 11.21 | 13.31 | 12.74 | |
Sex | 0.134## | |||
Male | 129 (64.5%) | 62 (53.7%) | 56 (62.2%) | |
Female | 71 (35.5%) | 72 (46.3%) | 34 (37.8%) | |
T-category | 0.161## | |||
T1 | 1 (0.5%) | 0 (0%) | 2 (2.2%) | |
T2 | 10 (5.0%) | 4 (3.0%) | 3 (3.3%) | |
T3 | 168 (84.0%) | 119 (88.8%) | 82 (91.1%) | |
T4 | 21 (10.5%) | 11 (8.2%) | 3 (3.3%) | |
N-category | 0.280## | |||
N0 | 82 (41.0%) | 64 (47.8%) | 45 (50%) | |
N1 | 71 (35.5%) | 46 (34.3%) | 33 (36.7%) | |
N2 | 47 (23.5%) | 24 (17.9%) | 12 (13.3%) | |
Stage | 0.240## | |||
II | 82 (41.0%) | 65 (48.5%) | 45 (50%) | |
III | 118 (59.0%) | 69 (51.5%) | 45 (50%) | |
Tumor site | < 0.001## | |||
Colon | 115 (57.5%) | 73 (54.5%) | 0 (0%) | |
Rectum | 85 (42.5%) | 61 (45.6%) | 90 (100%) | |