Table 2.
Analyses of factors regarding overall survival (OS)
| Variables | N | No. of deaths (%) | 3-year survival rate (%) | 5-year survival rate (%) | Log-rank test χ 2 value | P valuea |
|---|---|---|---|---|---|---|
| Age (years) | ||||||
| <60 | 249 | 89 (35.7) | 62.65 | 52.23 | 7.872 | 0.005 |
| ≥60 | 245 | 110 (44.9) | 48.18 | 33.05 | ||
| Gender | ||||||
| Male | 349 | 136 (39.0) | 58.20 | 46.34 | 3.332 | 0.068 |
| Female | 145 | 63 (43.5) | 49.27 | 34.06 | ||
| Histological grade | ||||||
| 1/2 | 164 | 56 (34.1) | 63.84 | 52.83 | 9.612 | 0.002 |
| 3/4 | 330 | 143 (43.3) | 51.56 | 37.44 | ||
| Location | ||||||
| Upper | 136 | 55 (40.4) | 55.11 | 48.53 | 0.04 | 0.842 |
| Middle | 131 | 56 (42.8) | 52.83 | 39.58 | ||
| Low | 197 | 75 (38.1) | 60.47 | 43.46 | ||
| Total | 30 | 13 (43.3) | 42.90 | 42.92 | ||
| pN status | ||||||
| N0 | 166 | 37 (22.3) | 74.01 | 66.23 | 48.54 | <0.0001 |
| N1 | 98 | 41 (1,8) | 55.70 | 41.58 | ||
| N2 | 121 | 58 (47.9) | 46.14 | 38.04 | ||
| N3 | 109 | 63 (57.8) | 41.33 | 16.46 | ||
| pT status | ||||||
| T1/T2 | 104 | 19 (18.3) | 76.09 | 70.84 | 22.606 | <0.0001 |
| T3/T4 | 390 | 180 (41.2) | 50.77 | 36.38 | ||
| TNM | ||||||
| I/II | 178 | 42 (23.6) | 73.66 | 63.75 | 35.073 | <0.0001 |
| III | 316 | 157 (49.7) | 45.86 | 31.81 | ||
| TSR | ||||||
| Stromal-low (TSR < 0.5) | 254 | 75 (29.5) | 66.19 | 58.68 | 25.566 | <0.0001 |
| Stromal-high (TSR ≥ 0.5) | 240 | 124 (51.7) | 44.71 | 27.64 |
OS overall survival, TSR tumor stromal ratio
a Bold indicates values with a significant difference P < 0.05