| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 28 |
18.7%
|
| -7 | Does not apply (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 45 |
30%
|
| 1 | 33 |
22%
|
|
| 2 | 30 |
20%
|
|
| 3 | 11 |
7.3%
|
|
| 4 | 1 |
0.7%
|
|
| 10 | 1 |
0.7%
|
|
| 60 | 1 |
0.7%
|
|
| Sysmiss | 352 |