Table 2.
Univariate analysis of DFS
| Variables | Patients, n | 5-year DFS, % | p value |
|---|---|---|---|
| Age, years | |||
| <60 | 169 | 96.7 | 0.253 |
| ≥60 | 38 | 100.0 | |
|
| |||
| Pathological T stage | |||
| T1 T2 |
176 31 |
100.0 82.4 |
<0.001 |
|
| |||
| Pathological N stage | |||
| NO | 191 | 97.1 | 0.513 |
| N1 | 16 | 100.0 | |
|
| |||
| Histologic grade | |||
| I or II III |
191 16 |
97.6 93.8 |
0.271 |
|
| |||
| Lymphovascular invasion | |||
| Absent | 179 | 96.9 | 0.370 |
| Present | 27 | 100.0 | |
|
| |||
| Resection margin | |||
| Negative (≥1 mm) | 171 | 97.9 | 0.167 |
| Positive or close (<1 mm) | 36 | 94.1 | |
|
| |||
| Chemotherapy | |||
| No Yes |
163 44 |
100.0 86.7 |
<0.001 |
|
| |||
| Regional nodal irradiation | |||
| No Yes |
194 13 |
97.1 100.0 |
0.478 |
|
| |||
| EPclin score | |||
| Low risk High risk |
154 53 |
100.0 88.9 |
<0.001 |