| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
7.4%
|
| 0 | Less than 1 hour | 19 |
27.9%
|
| 1 | 6 |
8.8%
|
|
| 2 | 6 |
8.8%
|
|
| 3 | 2 |
2.9%
|
|
| 4 | 4 |
5.9%
|
|
| 5 | 1 |
1.5%
|
|
| 8 | 3 |
4.4%
|
|
| 10 | 2 |
2.9%
|
|
| 12 | 2 |
2.9%
|
|
| 20 | 2 |
2.9%
|
|
| 21 | 1 |
1.5%
|
|
| 24 | 4 |
5.9%
|
|
| 34 | 1 |
1.5%
|
|
| 40 | 2 |
2.9%
|
|
| 48 | 4 |
5.9%
|
|
| 60 | 1 |
1.5%
|
|
| 72 | 2 |
2.9%
|
|
| 120 | 1 |
1.5%
|
|
| Sysmiss | 43 |