Multivariate analysis with site of recurrence for post-recurrence survival*
| Predictive factors | Independent covariate | ||
| P value | HR | 95% CI of HR | |
| Site of recurrence (three categories) | 0.007 | ||
| Single vs nodal | 0.5 | 0.6 | 0.14 to 2.5 |
| Multiple vs nodal | 0.055 | 2.8 | 0.98 to 7.9 |
| Multiple vs single | 0.007 | 4.7 | 1.5 to 14.7 |
| Post-recurrence treatment: surgery for recurrence (no vs yes) | 0.6 | 0.7 | 0.2 to 2.3 |
| Adjuvant chemotherapy (yes vs no) | 0.08 | 2.1 | 0.9 to 4.8 |
| Stage (advanced vs early) | 0.2 | 0.6 | 0.3 to 1.3 |
*After adjusting significant predictive factors obtained in univariate analysis.