TABLE I.
Patient characteristics
| Characteristic | Patient group | ||
|---|---|---|---|
|
| |||
| Overall | Intervention | Control | |
| Patients (n) | 42 | 21 | 21 |
| Mean age (years) | 54±9.5 | 54.5±8.3 | 53.4±10.7 |
| Sex [n (%) men] | 36 (85.7) | 19 (90.5) | 17 (81) |
| Smoking history [n (%)] | |||
| Nonsmoker | 15 (35.7) | 10 (47.6) | 5 (23.8) |
| Current smoker | 11 (26.2) | 4 (19) | 7 (33.3) |
| Mean pack–years | 32.6±11.3 | 34±16.1 | 31.7±9 |
| Ex-smoker | 15 (35.7) | 7 (33.3) | 8 (38.1) |
| Mean pack–years | 19.5±15.7 | 27.6±17.5 | 12.5±10.5 |
| Alcohol history [n (%)] | |||
| Non-drinker | 9 (21.4) | 5 (23.8) | 4 (19) |
| Light drinking | 14 (33.3) | 5 (23.8) | 9 (42.9) |
| Moderate drinking | 8 (19) | 7 (33.3) | 1 (4.8) |
| Heavy drinking | 8 (19) | 3 (14.3) | 5 (23.8) |
| Ex-drinker | 1 (2.4) | 0 (0) | 1 (4.8) |
| Unknown | 2 (4.8) | 1 (4.8) | 1 (4.8) |
| HPV status [n (%)] | |||
| Negative | 4 (9.5) | 1 (4.8) | 3 (14.3) |
| Positive | 26 (61.9) | 14 (66.7) | 12 (57.1) |
| Not available | 12 (28.6) | 6 (28.6) | 6 (28.6) |
HPV = human papillomavirus.