| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 |
20%
|
| 0 | Less than one day | 35 |
23.3%
|
| 1 | 31 |
20.7%
|
|
| 2 | 33 |
22%
|
|
| 3 | 13 |
8.7%
|
|
| 4 | 5 |
3.3%
|
|
| 6 | 1 |
0.7%
|
|
| 7 | 1 |
0.7%
|
|
| 10 | 1 |
0.7%
|
|
| Sysmiss | 352 |