Table I.
General characteristics of patients included in the present study (data downloaded from the TCGA database; number of patients for clinical significance analysis depends on the valid records).
| Variables | Number of patients | Variables | Number of patients |
|---|---|---|---|
| Age | Pathological stage | ||
| ≥60 | 120 | III–IV | 167 |
| <60 | 382 | I–II | 333 |
| Sex | T stage | ||
| Male | 135 | T3–T4 | 193 |
| Female | 367 | T1–T2 | 309 |
| Tumor status | N stage | ||
| With tumor | 44 | N1–3 | 223 |
| Tumor free | 446 | N0 | 229 |
| Primary neoplasm focus type | M stage | ||
| Multifocal | 226 | M1 | 9 |
| Unifocal | 266 | M0 | 282 |
T stage, size or direct extent of the primary tumor; N stage, degree of spread to regional lymph nodes; M stage, presence of distant metastasis.