| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.9%
|
| -6 | Still in progress | 0 |
0%
|
| 1 | One week or less | 42 |
79.2%
|
| 2 | 8 |
15.1%
|
|
| 3 | 1 |
1.9%
|
|
| 4 | 1 |
1.9%
|
|
| Sysmiss | 104 |