| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 14 |
14.9%
|
| 0 | Less than one day | 38 |
40.4%
|
| 1 | 20 |
21.3%
|
|
| 2 | 10 |
10.6%
|
|
| 3 | 7 |
7.4%
|
|
| 4 | 1 |
1.1%
|
|
| 5 | 1 |
1.1%
|
|
| 10 | 1 |
1.1%
|
|
| 30 | 2 |
2.1%
|
|
| Sysmiss | 380 |