Table 1 Description of all variables
| Â | Description (%) n = 377 |
|---|---|
Gender | Â |
 Male | 353 (93.6) |
 Female | 24 (6.4) |
Age | Â |
 < 50 | 44 (11.7) |
 50-59 | 131 (34.7) |
 60-69 | 176 (46.7) |
 70+ | 26 (6.9) |
Histological type | Â |
 Sq. CC | 371 (98.4) |
 Others | 6 (1.6) |
Neck dissection | 343 (91) |
T staging | Â |
 T2 | 35 (9.3) |
 T3 | 98 (26) |
 T4a | 244 (64.7) |
N staging | Â |
 No | 234 (62.1) |
 N1 | 56 (14.9) |
 N2a | 2 (0.5) |
 N2b | 40 (10.6) |
 N2c | 38 (10.1) |
 N3 | 7 (1.9) |
Degree of differentiation | Â |
 Well differentiation | 33 (8.8) |
 Moderate | 329 (87.3) |
 Poor | 15 (4) |
Site of the primary tumor | Â |
 Supraglottic | 27 (7.2) |
 Glottic | 13 (3.4) |
 Subglottic | 1 (0.3) |
 Glottic supraglottic | 160 (42.4) |
 Glottic subglottic | 82 (21.8) |
 Glottic, supra, sub | 94 (24.9) |
Subglottic invasion | 177 (46.9) |
Thyroid cartilage invasion | Â |
 Microscopic | 32 (8.5) |
 Gross | 209 (55.4) |
Nodal metastasis | 143 (37.9) |
Margin invasion | 25 (6.6) |
Margin invasion | Â |
 Upper | 5 (1.3) |
 Right | 3 (0.8) |
 Left | 8 (2.1) |
 Combined | 9 (2.4) |
Thyroid gland invasion | 24 (6.4) |
 Gross | 21 (5.6) |
 Microscopic | 3 (0.8) |
Hostile pathological features | 12 (3.2) |
Hostile pathological features | Â |
 Vascular invasion | 1 (0.3) |
 Peri-neural spread | 2 (0.5) |
 Extracapsular spread | 9 (2.4) |