| Value | Category |
|---|---|
| 1 | I did not chew betel nut with tobacco during the past 30 days |
| 2 | 1-5 betel nuts with tobacco |
| 3 | 6-10 betel nuts with tobacco |
| 4 | 11-15 betel nuts with tobacco |
| 5 | 16-20 betel nuts with tobacco |
| 6 | 21-25 betel nuts with tobacco |
| 7 | More than 25 betel nuts with tobacco |
| Sysmiss |