marginally significantp = 0.051
In the multivariable Cox regression model including T-stage, N-stage, clinical stage, surgical margins, and the status of C228T for overall survival, clinical stage remained significant (HR = 2.373; 95% CI: 1.072–5.256; p = 0.033) and the status of C228T was marginally significant (HR = 2.352; 95% CI: 0.995–5.558; p = 0.051).