| Value | Category | Cases | |
|---|---|---|---|
| 1 | more than once daily | 2006 |
13.3%
|
| 2 | once daily | 3501 |
23.3%
|
| 3 | less often than once daily | 2838 |
18.9%
|
| 4 | never | 6703 |
44.5%
|
| Sysmiss | 36260 |