| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 910 |
58.4%
|
| 2 | Less than 1 week | 105 |
6.7%
|
| 3 | 1 week to 15 days | 61 |
3.9%
|
| 4 | 16 days to 1 month | 52 |
3.3%
|
| 5 | 2 to 3 months | 78 |
5%
|
| 6 | 4 to 6 months | 54 |
3.5%
|
| 7 | 6 months to 1 year | 71 |
4.6%
|
| 8 | More than 1 year | 227 |
14.6%
|
| Sysmiss | 65 |