| Value | Category |
|---|---|
| 1 | I have never smoked cigarettes |
| 2 | Yes, from a program or professional |
| 3 | Yes, from a teacher |
| 4 | Yes, from a friend |
| 5 | Yes, from a family member |
| 6 | Yes, from both programs or professionals and from teachers, friends or family members |
| 7 | No |
| Sysmiss |