Table 4.
Multivariable analysis of recurrence-free survival on variables with significant effect in univariable analysis.
| Variablea | P value | HR | 95% CI |
|---|---|---|---|
| Gender | 0.030 | 2.849 | 1.110–7.315 |
| Stage | 0.384 | 1.589 | 0.560–4.512 |
| T status | 0.365 | 1.372 | 0.693–2.718 |
| N status | 0.700 | 0.836 | 0.337–2.077 |
| Margin status | 0.019 | 3.081 | 1.205–7.879 |
| Perineural permeation | 0.498 | 1.454 | 0.492–4.294 |
HR: hazard ratio; CI: confidence interval for HR.
aVariables included in multivariable Cox regression analysis using enter method; gender, female versus male (reference category); stage (ordinal variable); T status (ordinal variable); N status (ordinal variable); margin status, with tumor versus without tumor (reference category); perineural permeation, present versus absent (reference category).