| Value | Category | Cases | |
|---|---|---|---|
| 1 | none | 2 |
66.7%
|
| 2 | less than 1 cigarette per day | 1 |
33.3%
|
| 3 | 1-5 cigarettes per day | 0 |
0%
|
| 4 | 6-10 cigarettes per day | 0 |
0%
|
| 5 | 10-20 cigarettes per day | 0 |
0%
|
| 6 | 21-30 cigarettesper day | 0 |
0%
|
| 7 | more than 30 cigarettes per day | 0 |
0%
|
| Sysmiss | 5452 |