| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
18%
|
| -7 | Does not apply (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 24 |
27%
|
| 1 | 14 |
15.7%
|
|
| 2 | 28 |
31.5%
|
|
| 3 | 4 |
4.5%
|
|
| 4 | 1 |
1.1%
|
|
| 5 | 1 |
1.1%
|
|
| 30 | 1 |
1.1%
|
|
| Sysmiss | 262 |