Value | Category |
---|---|
1 | less than one cigarette per day |
2 | 1 cigarette per day |
3 | 2 to 5 cigarettes per day |
4 | 6 to 15 cigarettes per day (about ½ pack) |
5 | 16 to 25 cigarettes per day (about 1 pack) |
6 | 26 to 35 cigarettes per day (about 1 ½ packs) |
7 | more than 35 cigarettes per day (about 2 packs or more) |
9 | don't know/refuse to answer |