Value | Category |
---|---|
1 | I have never smoked |
2 | I have never smoked everyday |
3 | 1 to 5 cigarettes per day |
4 | 6 to 15 cigarettes (about 1/2 pack) per day |
5 | 16 to 25 cigarettes (about 1 pack) per day |
6 | 26 to 35 cigarettes (about 1 1/2 pack) per day |
7 | 36 cigarettes or more (about 2 packs or more) per day |
Sysmiss |