| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, e-cig with nicotine | 29 |
5.6%
|
| 2 | Yes, e-cig without nicotine | 87 |
16.7%
|
| 3 | Yes, e-cig with and without nicotine | 38 |
7.3%
|
| 4 | Yes, but I do not know whether with or without nicotine | 20 |
3.8%
|
| 5 | No | 346 |
66.5%
|
| Sysmiss | 3 |