Table 1. Univariate factors influencing prognosis of supraglottic squamous cell carcinoma.
| Variable | Epiglottis | Ventricular bands | Aryepiglottic fold | Ventricle of larynx | P |
|---|---|---|---|---|---|
| Sex | |||||
| Men | 25 | 22 | 26 | 33 | 0.858 |
| Women | 2 | 1 | 1 | 1 | |
| Age | |||||
| <60 years | 10 | 14 | 14 | 12 | 0.184 |
| ≥60 years | 17 | 9 | 13 | 22 | |
| pT stage | |||||
| T1 | 2 | 0 | 1 | 1 | 0.431 |
| T2 | 9 | 11 | 6 | 11 | |
| T3 | 13 | 9 | 11 | 13 | |
| T4 | 3 | 3 | 9 | 9 | |
| pN stage | |||||
| N0 | 13 | 16 | 17 | 28 | 0.119 |
| N1 | 6 | 2 | 6 | 2 | |
| N2 | 8 | 5 | 4 | 4 | |
| N3 | 0 | 0 | 0 | 0 | |
| pTNM stage | |||||
| Stage I | 2 | 0 | 1 | 1 | 0.588 |
| Stage II | 5 | 8 | 3 | 11 | |
| Stage III | 11 | 8 | 13 | 11 | |
| Stage IV | 9 | 7 | 10 | 11 | |
| Histology grade | |||||
| G1 | 10 | 9 | 6 | 12 | 0.260 |
| G2 | 9 | 11 | 14 | 19 | |
| G3 | 8 | 3 | 7 | 3 | |
| Surgery type | |||||
| Supraglottic laryngectomy | 1 | 3 | 1 | 1 | 0.000 |
| Horizontal hemilaryngectomy | 12 | 1 | 5 | 0 | |
| Vertical hemilaryngectomy | 0 | 7 | 0 | 11 | |
| Frontolateral laryngectomy | 2 | 0 | 0 | 0 | |
| Total laryngectomy | 12 | 12 | 21 | 22 | |
| R1 resection | |||||
| Yes | 5 | 5 | 6 | 6 | 0.964 |
| No | 22 | 18 | 21 | 28 | |
| Treatment modality | |||||
| S | 18 | 11 | 17 | 19 | 0.532 |
| S+R | 9 | 12 | 9 | 13 | |
| S+C | 0 | 0 | 1 | 2 | |
| Neck metastasis | |||||
| Yes | 13 | 16 | 17 | 28 | 0.042 |
| No | 14 | 7 | 10 | 6 |
S, Surgery; R, Post-operative radiation therapy; C, Post-operative chemotherapy; R1 resection was defined when the distance of the tumour from the resection margin was less or equal 1 mm.