Table 1.
Baseline demographics and lifestyle characteristics of laryngeal squamous cell cancer patients.
| Covariates | Number of patients/mean |
|---|---|
| No. of individuals | 814 |
| Age at diagnosis (years), mean, range | 60.66, 27-89 |
| >60 | 399 |
| ≥60 | 415 |
| Body mass index (kg/m2), mean, range | 22.94, 16.72-28.43 |
| Male (%) | 100% |
| Death events | 191 |
| Duration of follow-up (months), median, range | 72, 3-116 |
| Smoking history (yes/no) | 570/244 |
| Drinking history (yes/no) | 309/505 |
| Hypertension (yes/no) | 229/585 |
| Median recurrence (months), range | 23, 1-95 |
| T stage | |
| T1 | 195 |
| T2 | 328 |
| T3 | 239 |
| T4 | 52 |
| N stage | |
| N0 | 722 |
| N1 | 31 |
| N2 | 52 |
| N3 | 9 |
| TNM stage | |
| I | 195 |
| II | 302 |
| III | 216 |
| IV | 101 |
| Tumour size (cm), mean, range | 1.80, 0-6.5 |
| Tumour size (≤2 cm/>2 cm) | 511/303 |
| Neck dissection (yes/no) | 145/669 |
| Operation therapy | |
| Total laryngectomy | 326 |
| Partial laryngectomy | 488 |
| Tumour subsite | |
| Supraglottic | 179 |
| Subglottic | 11 |
| Glottic | 624 |