Table 5.
Summary of univariate analysis of prognostic factors for disease-free survival
| Parameter | Cases observed | Cases died | P value |
|---|---|---|---|
| Gender | |||
| Male | 270 | 191 | .1202 |
| Female | 281 | 203 | |
| Age | |||
| ≤40 years | 74 | 50 | .5086 |
| >40 years | 281 | 203 | |
| Stage | |||
| I | 5 | 2 | .0001 |
| II | 140 | 71 | |
| III | 164 | 136 | |
| IV | 46 | 44 | |
| EBEV1 | |||
| Negative | 113 | 36 | .0001 |
| Positive | 242 | 186 | |
| Status of lymph node | |||
| Residue | 70 | 36 | .0001 |
| Recurrence | 285 | 220 | |
| Bilateral of cervical lymph nodes | |||
| No | 330 | 230 | .0028 |
| Yes | 25 | 23 | |
| Size of lymph node | |||
| ≤3 cm | 225 | 139 | .0001 |
| 3–6 cm | 128 | 112 | |
| 6 cm | 2 | 2 | |
| Invasion | |||
| No | 205 | 117 | .0028 |
| Yes | 150 | 136 | |
| Complete surgical excision | |||
| No residual | 326 | 224 | .0001 |
| Residual | 29 | 29 | |