| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
14.1%
|
| -7 | Does not apply (spontaneous) | 2 |
3.1%
|
| 0 | Less than one day | 20 |
31.3%
|
| 1 | 3 |
4.7%
|
|
| 2 | 12 |
18.8%
|
|
| 3 | 3 |
4.7%
|
|
| 4 | 1 |
1.6%
|
|
| 5 | 1 |
1.6%
|
|
| 7 | 6 |
9.4%
|
|
| 10 | 3 |
4.7%
|
|
| 15 | 1 |
1.6%
|
|
| 20 | 3 |
4.7%
|
|
| Sysmiss | 944 |