| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
6%
|
| -6 | Still in progress | 0 |
0%
|
| 1 | One week or less | 16 |
32%
|
| 3 | 1 |
2%
|
|
| 4 | 27 |
54%
|
|
| 12 | 1 |
2%
|
|
| 30 | 2 |
4%
|
|
| Sysmiss | 550 |