Table 5.
Multivariate Cox hazards regression model for the factors influencing overall survival and disease-specific survival in patients with node-positive squamous cell carcinoma who underwent selective neck dissection.
| Variable | Factors | Overall Survival | ||
|---|---|---|---|---|
| HR | 95% CI | p-Value | ||
| Before stepwise selection | ||||
| Surgical margin status | Positive | 1.98 | 0.26–14.92 | 0.50 |
| Number of positive nodes | >2 | 3.82 | 0.81–17.86 | 0.08 |
| After stepwise selection | ||||
| Number of positive nodes | >2 | 4.98 | 1.48–16.72 | <0.01 |
| Variable | Factors | Disease-Specific Survival | ||
| HR | 95% CI | p-Value | ||
| Before stepwise selection | ||||
| Tumor grade | Grade 2 + 3 | 1.98 | 0.69–5.72 | 0.20 |
| Surgical margin status | Positive | 1.08 | 0.14–8.30 | 0.93 |
| Number of positive nodes | >2 | 6.17 | 1.17–32.38 | 0.03 |
| After stepwise selection | ||||
| Number of positive nodes | >2 | 6.44 | 1.76–23.50 | <0.01 |
CI: confidence interval; HR: hazard ratio.