| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
12.2%
|
| 0 | Less than 1 hour | 14 |
34.1%
|
| 1 | 5 |
12.2%
|
|
| 2 | 5 |
12.2%
|
|
| 4 | 1 |
2.4%
|
|
| 5 | 1 |
2.4%
|
|
| 8 | 2 |
4.9%
|
|
| 9 | 1 |
2.4%
|
|
| 18 | 1 |
2.4%
|
|
| 30 | 1 |
2.4%
|
|
| 48 | 1 |
2.4%
|
|
| 60 | 1 |
2.4%
|
|
| 72 | 1 |
2.4%
|
|
| 96 | 1 |
2.4%
|
|
| 120 | 1 |
2.4%
|
|
| Sysmiss | 110 |