| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than 1 hour | 22 |
27.5%
|
| 1 | 9 |
11.3%
|
|
| 2 | 9 |
11.3%
|
|
| 3 | 8 |
10%
|
|
| 4 | 1 |
1.3%
|
|
| 5 | 7 |
8.8%
|
|
| 6 | 3 |
3.8%
|
|
| 10 | 6 |
7.5%
|
|
| 15 | 2 |
2.5%
|
|
| 20 | 3 |
3.8%
|
|
| 24 | 4 |
5%
|
|
| 30 | 1 |
1.3%
|
|
| 45 | 1 |
1.3%
|
|
| 48 | 1 |
1.3%
|
|
| 72 | 1 |
1.3%
|
|
| 75 | 1 |
1.3%
|
|
| 120 | 1 |
1.3%
|
|
| Sysmiss | 280 |