| Value | Category | Cases | |
|---|---|---|---|
| 1 | More comfortable | 1566 |
56.6%
|
| 2 | Less comfortable | 539 |
19.5%
|
| 3 | No difference from non-smokers | 263 |
9.5%
|
| 4 | 140 |
5.1%
|
|
| 5 | 260 |
9.4%
|
|
| Sysmiss | 42 |