Table 2.
Prognostic factors of SEER cause-specific survival among SEER patients with lymph node (LN) involved salivary gland cancer
| Variables | Hazard ratio (95% CIs) | P |
|---|---|---|
| Primary site | ||
| Parotid (reference) | ||
| Submandibular | 1.413 (1.126–1.773) | 0.002 |
| Sublingual | 1.230 (0.398–3.919) | 0.702 |
| Others | 0.684 (0.337–1.386) | 0.291 |
| T classification | ||
| T1 + T2 (reference) | ||
| T3 + T4 | 1.870 (1.474–2.373) | < 0.001 |
| Tx | 0.937 (0.613–1.431) | 0.762 |
| N classification | ||
| N1 (reference) | ||
| N2 | 1.421 (1.130–1.787) | 0.003 |
| N3 | 2.099 (1.266–3.479) | 0.004 |
| M classification | ||
| M0 (reference) | ||
| M1 | 5.229 (3.604–7.586) | < 0.001 |
| Mx | 1.452 (0.846–2.494) | 0.176 |
| No. of LNs examined | 1.012 (1.007–1.017) | < 0.001 |
| Lymph node ratio(LNR) | 2.208 (1.671–2.918) | < 0.001 |
| Age | 1.017 (1.007–1.017) | < 0.001 |