| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never smoked | 0 |
0%
|
| 2 | I did not smoke during the past 12 months | 0 |
0%
|
| 3 | Yes | 39 |
86.7%
|
| 4 | No | 6 |
13.3%
|
| Sysmiss | 2718 |