Table 1.
Smoking characteristics by age group in the Central Vietnamese male cohort.
| Variable | Age group | ||||||
|---|---|---|---|---|---|---|---|
| 18-24 | 25-34 | 35-44 | 45-54 | 55-64 | >65 | All | |
| n | n | n | n | n | n | n | |
| Total | 484 | 272 | 243 | 272 | 183 | 368 | 1822 |
| Smokers | 346 | 187 | 211 | 238 | 163 | 308 | 1453 |
| Age started smoking | 17 | 19 | 20 | 20 | 19 | 19 | 19 |
| SD | 2 | 4 | 4 | 5 | 5 | 5 | 4 |
| Cigarettes per day | |||||||
| Up to 10 | 208 | 89 | 90 | 73 | 65 | 109 | 634 |
| 11-20 | 118 | 84 | 91 | 112 | 74 | 142 | 621 |
| 21-30 | 9 | 12 | 25 | 38 | 20 | 40 | 144 |
| More than 31 | 8 | 1 | 3 | 11 | 3 | 15 | 41 |
| Quitting attempts | 1.1 | 1.1 | 1.0 | 0.9 | 1.0 | 0.9 | 1.0 |
| SD | 1.2 | 1.2 | 1.1 | 1.0 | 0.9 | 1.0 | 1.1 |
| FTND score | |||||||
| Mean | 3.2 | 3.4 | 4.0 | 4.6 | 4.4 | 4.8 | 4.1 |
| SD | 2.2 | 2.3 | 2.3 | 2.3 | 2.2 | 2.4 | 2.4 |
| Low scorers | 286 | 143 | 149 | 143 | 112 | 182 | 1015 |
| High scorers | 58 | 43 | 61 | 93 | 51 | 125 | 431 |
| HSI score | |||||||
| Low | 304 | 154 | 173 | 165 | 128 | 231 | 1155 |
| High | 39 | 32 | 36 | 69 | 34 | 75 | 285 |
Abbreviations: FTND, Fagerström Test for Nicotine Dependence; HSI, Heaviness of Smoking Index; SD, standard deviation.