Table 1 Patients characteristics
Characteristic | Training cohort | Validation cohort | P value | |||
|---|---|---|---|---|---|---|
No.patients | % | No.patients | % | |||
Age | < 60 | 106 | 29.2 | 44 | 33.3 | 0.376 |
≥60 | 257 | 70.8 | 88 | 66.7 | ||
Race | White | 265 | 73.0 | |||
Black | 26 | 7.2 | ||||
Others | 72 | 19.8 | ||||
Sex | Female | 136 | 37.5 | 41 | 31.1 | 0.204 |
Male | 227 | 62.5 | 91 | 68.9 | ||
Grade | Well/moderate | 217 | 59.8 | 61 | 46.2 | < 0.001 |
Poor/undifferentiated | 102 | 28.1 | 68 | 51.5 | ||
Unknown | 44 | 12.1 | 3 | 2.3 | ||
T stage | T1 | 55 | 15.2 | 8 | 6.1 | < 0.001 |
T2 | 175 | 48.2 | 80 | 60.6 | ||
T3 | 50 | 13.8 | 30 | 22.7 | ||
T4 | 24 | 6.6 | 10 | 7.6 | ||
Tx | 59 | 16.3 | 4 | 3.0 | ||
M stage | M0 | 345 | 95 | 130 | 98.5 | 0.119 |
M1 | 18 | 5 | 2 | 1.5 | ||
RN status | RN examined and not positive | 169 | 46.6 | 71 | 53.8 | 0.253 |
RN examined and < 4 nodes positive | 114 | 31.4 | 40 | 30.3 | ||
RN examined and > =4 nodes positive | 34 | 9.4 | 12 | 9.1 | ||
RN not examined or RN unknown | 46 | 12.7 | 9 | 6.8 | ||
Vascular Invasion | Absent | 315 | 86.8 | 84 | 63.6 | 0.399 |
Present | 48 | 13.2 | 48 | 36.4 | ||
Tumor size | 1–19 mm | 88 | 24. | 29 | 22.0 | 0.871 |
20-33 mm | 160 | 44.1 | 60 | 45.5 | ||
≥34 mm | 115 | 31.7 | 43 | 32.6 | ||