| Value | Category |
|---|---|
| 1 | I have never smoked tobacco products |
| 2 | I don’t smoke tobacco products anymore |
| 3 | I smoke, but I never drink alcohol |
| 4 | No, I smoke less, while I drink alcohol |
| 5 | Yes, I smoke more often when I drink alcohol |
| 6 | I smoke more or less the same while I drink and don’t drink alcohol |
| Sysmiss |