| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
8.6%
|
| 0 | Less than one day | 21 |
22.6%
|
| 1 | 19 |
20.4%
|
|
| 2 | 23 |
24.7%
|
|
| 3 | 13 |
14%
|
|
| 4 | 3 |
3.2%
|
|
| 5 | 1 |
1.1%
|
|
| 7 | 3 |
3.2%
|
|
| 10 | 1 |
1.1%
|
|
| 30 | 1 |
1.1%
|
|
| Sysmiss | 261 |