| Value | Category |
|---|---|
| 1 | I have never chewed betel nut |
| 2 | Yes, from a program (such as a public health program) or professional |
| 3 | Yes, from a friend |
| 4 | Yes, from a family member. |
| 5 | Yes, from both programs or professionals and from friends or family members |
| 6 | No |
| Sysmiss |