Value | Category |
---|---|
1 | I have never smoked cigarettes |
2 | I did not smoke cigarettes during the past 30 days |
3 | Less than 1 cigarette per day |
4 | 1 cigarette per day |
5 | 2 to 5 cigarettes per day |
6 | 6 to 10 cigarettes per day |
7 | 11 to 20 cigarettes per day |
8 | More than 20 cigarettes per day |
Sysmiss |