| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
12.5%
|
| 0 | Less than 1 hour | 23 |
35.9%
|
| 1 | 4 |
6.3%
|
|
| 2 | 6 |
9.4%
|
|
| 3 | 7 |
10.9%
|
|
| 4 | 3 |
4.7%
|
|
| 5 | 6 |
9.4%
|
|
| 6 | 3 |
4.7%
|
|
| 8 | 1 |
1.6%
|
|
| 10 | 1 |
1.6%
|
|
| 25 | 1 |
1.6%
|
|
| 80 | 1 |
1.6%
|
|
| Sysmiss | 89 |