| Value | Category | Cases | |
|---|---|---|---|
| 0 | I do not smoke | 0 |
0%
|
| 1 | 1 cigarette a week or less | 0 |
0%
|
| 2 | Less than 1 cigarette a day | 0 |
0%
|
| 3 | 2-5 cigarettes a day | 1 |
100%
|
| 4 | More than 5 cigarettes a day | 0 |
0%
|
| 996 | Refuse to answer | 0 |
0%
|
| 999 | Don’t know | 0 |
0%
|
| Sysmiss | 493 |