Table 7.
Association between study variables and LSCC patients’ mortality in univariate Cox proportional hazards model.
| Variable | HR 1 | Univariate 95% CI 2 | p-Value 6 | |
|---|---|---|---|---|
| T 3 | T2 vs. T1 | 6.879 | 2.747–17.228 | 0.000 |
| T3 vs. T1 | 6.575 | 2.592–16.681 | 0.000 | |
| T4 vs. T1 | 7.644 | 3.134–18.644 | 0.000 | |
| N 4 | N≥1 vs. N = 0 | 2.969 | 1.808–4.877 | 0.000 |
| G 5 | G3 vs. G1 | 0.383 | 0.181–0.812 | 0.023 |
| G3 vs. G2 | 0.418 | 0.213–0.818 | 0.011 | |
| Stage | II vs. I | 6.569 | 2.623–16.454 | 0.000 |
| III vs. I | 6.423 | 2.491–16.559 | 0.000 | |
| IV vs. I | 7.169 | 2.959–17.371 | 0.000 | |
| Smoking ≥25 years vs. <25 years |
2.372 | 0.915–6.147 | 0.046 | |
| Alcohol Users vs. Non-drinkers |
1.670 | 0.644–4.328 | 0.291 | |
|
IL-9 rs1859430 AA vs. AG and GG |
2.503 | 1.194–5.246 | 0.015 | |
1 HR: hazard ratio; 2 CI: confidence interval; 3 T: tumour size; 4 N: metastasis to the neck lymph nodes; 5 G: tumour differentiation grade; 6 p-Value: significance level p < 0.05.