| Value | Category | Cases | |
|---|---|---|---|
| 1 | More comfortable | 343 |
22.1%
|
| 2 | Less comfortable | 221 |
14.3%
|
| 3 | No difference from non-smokers | 122 |
7.9%
|
| 4 | I don't know | 863 |
55.7%
|
| Sysmiss | 24 |