| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 5 |
41.7%
|
| 1 | 2 |
16.7%
|
|
| 2 | 3 |
25%
|
|
| 3 | 1 |
8.3%
|
|
| 4 | 1 |
8.3%
|
|
| Sysmiss | 462 |