| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 829 |
63.7%
|
| 2 | Less than 1 week | 73 |
5.6%
|
| 3 | 1 week to 15 days | 53 |
4.1%
|
| 4 | 16 days to 1 month | 50 |
3.8%
|
| 5 | 2 to 3 months | 49 |
3.8%
|
| 6 | 4 to 6 months | 43 |
3.3%
|
| 7 | 6 months to 1 year | 48 |
3.7%
|
| 8 | More than 1 year | 157 |
12.1%
|
| Sysmiss | 30 |