Table 4: Multivariable analysis of recurrence-free survival on variables with significant effect in univariable analysis.

Variablea valueHR95% CI

T status0.3651.3720.693–2.718
N status0.7000.8360.337–2.077
Margin status0.0193.0811.205–7.879
Perineural permeation0.4981.4540.492–4.294

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).