| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
2.5%
|
| -7 | Does not apply (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 36 |
22.9%
|
| 1 | 56 |
35.7%
|
|
| 2 | 36 |
22.9%
|
|
| 3 | 13 |
8.3%
|
|
| 4 | 3 |
1.9%
|
|
| 5 | 4 |
2.5%
|
|
| 6 | 1 |
0.6%
|
|
| 7 | 4 |
2.5%
|
|
| Sysmiss | 197 |