Table 2.
Univariate analysis for three- year LFFS, DMFS, and OS
| Parameter | LFFS (%) | DMFS (%) | OS (%) |
|---|---|---|---|
| Age | |||
| ≦51 | 61.3 | 76.1 | 58.4 |
| > 51 | 79.9 | 88.0 | 63.4 |
| p = 0.02 | p = 0.13 | p = 0.76 | |
| Tumor site | |||
| Oral cavity | 64.8 | 81.7 | 56.4 |
| others | 88.0 | 82.9 | 70.4 |
| p = 0.06 | p = 0.46 | p = 0.28 | |
| Stage | |||
| I + II | 80.2 | 100 | 71.5 |
| III + IV | 68.3 | 76.6 | 57.4 |
| p = 0.23 | p = 0.04 | p = 0.13 | |
| Margin | |||
| Positive | 64.6 | 89.5 | 41.0 |
| Negative | 73.3 | 79.2 | 67.6 |
| p = 0.85 | p = 0.14 | p = 0.05 | |
| Extracapsular extension | |||
| Positive | 68.7 | 77.0 | 64.0 |
| Negative | 70.8 | 83.4 | 58.6 |
| p = 0.76 | p = 0.93 | p = 0.11 | |
| LNR for all patients | |||
| < 0.1 | 76.1 | 87.2 | 67.0 |
| ≧0.1 | 54.9 | 66.4 | 41.0 |
| p = 0.015 | p = 0.06 | p = 0.004 | |
| LNR for lymph node-positive patients | |||
| < 0.06 | 75.6 | 94.1 | 77.8 |
| 0.06–0.17 | 74.8 | 71.1 | 59.7 |
| > 0.17 | 24.2 | 57.3 | 23.5 |
| p = 0.011 | p = 0.18 | p = 0.003 | |
| Absolute number of lymph node metastasis | |||
| 1 | 60.0 | 75.8 | 48.5 |
| > 1 | 66.4 | 76.6 | 58.0 |
| p = 0.46 | p = 0.96 | p = 0.28 |
OS overall survival, LFFS local failure-free survival, DMFS distant metastasis-free survival, LNR lymph node ratio