| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 35 |
24.1%
|
| 0 | Less than one day | 37 |
25.5%
|
| 1 | 13 |
9%
|
|
| 2 | 27 |
18.6%
|
|
| 3 | 11 |
7.6%
|
|
| 4 | 5 |
3.4%
|
|
| 5 | 2 |
1.4%
|
|
| 7 | 11 |
7.6%
|
|
| 10 | 2 |
1.4%
|
|
| 15 | 1 |
0.7%
|
|
| 90 | 1 |
0.7%
|
|
| Sysmiss | 206 |