Table 1.
Clinicopathologic characteristics of the patients studied
| Characteristic | No. cases (%) |
|---|---|
| Age, mean (range) | 58.6 (30–86 years) |
| Tobacco | |
| Non-smokers | 12 (3.5) |
| Moderate (1–50 packs-year) | 207 (55.5) |
| Heavy (> 50 packs-year) | 153 (41) |
| Alcohol | |
| Non-drinkers | 37 (10) |
| Drinkers | 335 (90) |
| Location | |
| Oropharynx | 241 (65) |
| Hypopharynx | 64 (17) |
| Larynx | 67 (18) |
| pT classification | |
| T1 | 38 (10) |
| T2 | 77 (21) |
| T3 | 125 (34) |
| T4 | 132 (35) |
| pN classification | |
| N0 | 103 (28) |
| N1 | 46 (12) |
| N2 | 183 (49) |
| N3 | 40 (11) |
| Stage | |
| I | 20 (5) |
| II | 24 (6) |
| III | 64 (17) |
| IV | 264 (71) |
| Degree of differentiation | |
| Well-differentiated | 147 (39) |
| Moderately differentiated | 148 (40) |
| Poorly differentiated | 77 (21) |
| Total | 372 |