| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.5%
|
| 0 | Less than 1 hour | 29 |
42.6%
|
| 1 | 4 |
5.9%
|
|
| 2 | 7 |
10.3%
|
|
| 3 | 2 |
2.9%
|
|
| 4 | 2 |
2.9%
|
|
| 5 | 8 |
11.8%
|
|
| 6 | 4 |
5.9%
|
|
| 8 | 2 |
2.9%
|
|
| 10 | 1 |
1.5%
|
|
| 13 | 1 |
1.5%
|
|
| 14 | 1 |
1.5%
|
|
| 15 | 1 |
1.5%
|
|
| 30 | 1 |
1.5%
|
|
| 52 | 1 |
1.5%
|
|
| 60 | 2 |
2.9%
|
|
| 120 | 1 |
1.5%
|
|
| Sysmiss | 94 |