| Value | Category | Cases | |
|---|---|---|---|
| 1 | I do not smoke | 1038 |
79%
|
| 2 | More than 4 weeks | 98 |
7.5%
|
| 3 | 4 weeks | 25 |
1.9%
|
| 4 | 2-3 weeks | 36 |
2.7%
|
| 5 | 1 week | 25 |
1.9%
|
| 6 | 1-2 days | 38 |
2.9%
|
| 7 | Less than a day | 29 |
2.2%
|
| 8 | Less than an hour | 25 |
1.9%
|
| Sysmiss | 4 |