Variables | Assigned score | Hazard ratio (95Â % CI) | P-value |
---|---|---|---|
Primary site | Â | Â | |
 Tongue | 1 | 2.240 (0.924–5.267) | 0.073 |
 Mandible | 2 |  |  |
 Maxilla | 3 |  |  |
 Oral floor | 4 |  |  |
 Buccal mucosa | 5 |  |  |
T-stage | Â | Â | |
 T1, T2 | 1 | 0.942 (0.419–2.132) | 0.885 |
 T3 | 2 |  |  |
 T4 | 3 |  |  |
N-stage | Â | Â | |
 N0, N1 | 0 | 1.844 (0.701–5.063) | 0.217 |
  ≥ N2 | 1 |  |  |
Differentiation | Â | Â | |
 Well | 0 | 0.636 (0.267–1.348) | 0.249 |
 Moderate | 1 |  |  |
Pathological response | Â | Â | |
 Grades 0, I, IIa | 1 | 0.226 (0.093–0.527) | 0.001* |
 Grade IIb | 2 |  |  |
 Grade III | 3 |  |  |
 Grade IV | 4 |  |  |
NLR status | Â | Â | |
 Low | 0 | 2.013 (1.029–4.144) | 0.041* |
 High | 1 |  |  |