Table 8.
Association between study variables and LSCC patients’ mortality in the final multivariable Cox proportional hazards model after applying the Backward Stepwise selection method.
| Variable | HR 1 | Multivariable 95% CI 2 | p-Value 5 | |
|---|---|---|---|---|
| T 3 | T2 vs. T1 | 6.687 | 2.645–16.904 | 0.000 |
| T3 vs. T1 | 5.941 | 2.313–15.259 | 0.000 | |
| T4 vs. T1 | 6.466 | 2.563–16.313 | 0.000 | |
| N 4 | N ≥ 1 vs. N = 0 | 1.850 | 1.099–3.113 | 0.021 |
|
IL-9 rs1859430 AA vs. AG and GG |
2.964 | 1.397–6.285 | 0.005 | |
1 HR: hazard ratio; 2 CI: confidence interval; 3 T: tumour size; 4 N: metastasis to the neck lymph nodes; 5 p-Value: significance level p < 0.05.