| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 0 |
0%
|
| 3 | 1 |
33.3%
|
|
| 6 | 1 |
33.3%
|
|
| 7 | 1 |
33.3%
|
|
| Sysmiss | 357 |