Table 1 Patient characteristics, sites and staging of primary malignancies
| Parameter | Number of patients |
|---|---|
| Mean Age at presentation (years ± SD) | 63 ± 13.9 |
| Gender (n, %) | |
| -Male | 522 (74.4) |
| -Female | 180 (25.6) |
| Active or ex-smokers (n, %) | |
| -Yes | 393 (56) |
| -No | 309 (44) |
| Active or ex-drinkers (n, %) | |
| -Yes | 209 (29.8) |
| -No | 493 (70.2) |
| Sites of primary malignancies (n, %) | |
| -Oral cavity | 356 (50.7) |
| -Larynx | 126 (17.9) |
| -Hypopharynx | 110 (15.7) |
| -Oropharynx | 74 (10.5) |
| -Paranasal sinuses and nasal cavity | 33 (4.7) |
| Stages of primary malignancies (n, %) | |
| -Stage 1 | 162 (23.3) |
| -Stage 2 | 92 (13.1) |
| -Stage 3 | 89 (12.7) |
| -Stage 4 | 357 (50.9) |
