| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
3%
|
| 0 | Less than 1 hour | 50 |
37.3%
|
| 1 | 17 |
12.7%
|
|
| 2 | 18 |
13.4%
|
|
| 3 | 10 |
7.5%
|
|
| 4 | 4 |
3%
|
|
| 5 | 4 |
3%
|
|
| 6 | 4 |
3%
|
|
| 8 | 2 |
1.5%
|
|
| 10 | 2 |
1.5%
|
|
| 12 | 3 |
2.2%
|
|
| 14 | 1 |
0.7%
|
|
| 15 | 1 |
0.7%
|
|
| 16 | 1 |
0.7%
|
|
| 23 | 1 |
0.7%
|
|
| 24 | 4 |
3%
|
|
| 48 | 2 |
1.5%
|
|
| 50 | 2 |
1.5%
|
|
| 60 | 1 |
0.7%
|
|
| 72 | 2 |
1.5%
|
|
| 120 | 1 |
0.7%
|
|
| Sysmiss | 891 |