| Value | Category |
|---|---|
| -9 | Don't know |
| -8 | Refused |
| -5 | Not applicable |
| -3 | Missing |
| -2 | Not asked in Phase 2 |
| 1 | 13 or more standard drinks |
| 2 | 9 to 12 standard drinks |
| 3 | 7 to 8 standard drinks |
| 4 | 5 to 6 standard drinks |
| 5 | 3 or 4 standard drinks |
| 6 | 1 or 2 standard drinks |
| Sysmiss |