| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, e-cig with nicotine | 87 |
7.5%
|
| 2 | Yes, e-cig without nicotine | 223 |
19.3%
|
| 3 | Yes, e-cig with and without nicotine | 206 |
17.9%
|
| 4 | Yes, but I do not know whether with or without nicotine | 78 |
6.8%
|
| 5 | No | 559 |
48.5%
|
| Sysmiss | 4 |