| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Sometimes (between 10% and 50% of cigarettes I smoked were shared with others) | 8 |
1.9%
|
| 2 | 2. Often (more than 50% of cigarettes I smoked were shared with others) | 5 |
1.2%
|
| 3 | 3. Rarely (less than 10% of cigarettes I smoked were shared with others) | 45 |
10.9%
|
| 4 | 4. Never | 353 |
85.9%
|
| Sysmiss | 588 |