| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
14.5%
|
| 0 | Less than 1 hour | 22 |
40%
|
| 1 | 3 |
5.5%
|
|
| 2 | 8 |
14.5%
|
|
| 3 | 2 |
3.6%
|
|
| 4 | 4 |
7.3%
|
|
| 5 | 1 |
1.8%
|
|
| 6 | 1 |
1.8%
|
|
| 8 | 2 |
3.6%
|
|
| 12 | 1 |
1.8%
|
|
| 16 | 1 |
1.8%
|
|
| 24 | 1 |
1.8%
|
|
| 40 | 1 |
1.8%
|
|
| Sysmiss | 102 |