Table 3 Characteristics of external validation data
External validation set (n = 488) | ||
|---|---|---|
Characteristics | Number of patients | % |
Marital status | ||
 Married | 433 | 88.730 |
 Other | 55 | 11.270 |
Size, cm | ||
 ≤ 5 | 330 | 67.623 |
 > 5 | 158 | 32.377 |
Pathological grade | ||
 I/II | 413 | 84.631 |
 III/IV | 75 | 15.369 |
AJCC T stage | ||
 T1/T2 | 112 | 22.951 |
 T3 | 80 | 16.393 |
 T4 | 296 | 60.656 |
AJCC N stage | ||
 N0 | 298 | 61.066 |
 N1 | 145 | 29.713 |
 N2 | 45 | 9.221 |
AJCC M stage | ||
 M0 | 484 | 99.180 |
 M1 | 4 | 0.820 |
CEA | ||
 Elevated | 194 | 39.754 |
 Normal | 294 | 60.246 |
Perineural invasion | ||
 Positive | 42 | 8.607 |
 Negative | 446 | 91.393 |
Chemotherapy | ||
 Yes | 182 | 37.295 |
 No/unknown | 306 | 62.705 |