Characteristic | N (%) |
Age at smoking initiation, mean years (SD) | 17.2 (3.5) |
Duration of regular smoking, mean years (SD) | 14.1 (8.5) |
Expense for smoking (1,000 VND per month), mean (SD) | 306.3 (289.4) |
Fagerström test for nicotine dependence score, mean (SD) | 4.5 (2.4) |
Nicotine dependence scale, n (%) | |
Very low | 231 (26.1) |
Low | 239 (27.0) |
Moderate | 115 (12.9) |
High | 184 (20.8) |
Very high | 117 (13.2) |
Number of cigarette per day, n (%) | |
≤10 | 409 (46.2) |
11–20 | 407 (45.9) |
21–30 | 49 (5.5) |
>30 | 21 (2.4) |