Parameter | Characteristic | Total number (cases) | Relative frequency (%) |
---|---|---|---|
Sex | Male | 354 | 92.2 |
 | Female | 30 | 7.8 |
Age (grouped) | ≤59 | 194 | 50.5 |
 | >59 | 190 | 49.5 |
Smoking status | Smokers | 264 | 68.8 |
 | Ex-smokers | 81 | 21.1 |
 | Non-smokers | 39 | 10.1 |
 | n.a. | 384 |  |
Tumor localization | Supraglottic | 208 | 54.2 |
 | Glottic | 142 | 37.0 |
 | Subglottic | 15 | 3.9 |
 | Not specified | 19 | 4.9 |
Histological differentiation | G1 | 26 | 6.8 |
G2 | 232 | 60.4 | |
G1/2 | 258 | 67.2 | |
 | G3 | 88 | 22.9 |
G4 | 15 | 3.9 | |
G3/4 | 103 | 26.8 | |
 | Unknown | 23 | 6.0 |
Total N | N0 | 188 | 49.0 |
 | N1 | 29 | 7.6 |
 | N2a | 7 | 1.8 |
 | N2b | 50 | 13.0 |
 | N2c | 75 | 19.5 |
 | N3 | 35 | 9.1 |