| Value | Category | Cases | |
|---|---|---|---|
| 1 | More friends | 2017 |
72.9%
|
| 2 | Less friends | 313 |
11.3%
|
| 3 | No difference from non-smokers | 114 |
4.1%
|
| 4 | 86 |
3.1%
|
|
| 5 | 237 |
8.6%
|
|
| Sysmiss | 43 |