Value | Category |
---|---|
1 | Did not smoked within the past one month (30 days) |
2 | Less than one cigarette daily |
3 | One cigarette daily |
4 | 2 to 5 cigarettes daily |
5 | 6 to 10 cigarettes daily |
6 | 11 to 20 cigarettes daily |
7 | more than 20 cigarettes daily |
Sysmiss |