| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
25%
|
| 0 | Less than one day | 2 |
7.1%
|
| 1 | 3 |
10.7%
|
|
| 2 | 1 |
3.6%
|
|
| 3 | 2 |
7.1%
|
|
| 4 | 1 |
3.6%
|
|
| 5 | 1 |
3.6%
|
|
| 7 | 6 |
21.4%
|
|
| 12 | 2 |
7.1%
|
|
| 14 | 1 |
3.6%
|
|
| 17 | 1 |
3.6%
|
|
| 21 | 1 |
3.6%
|
|
| Sysmiss | 125 |