| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
4.6%
|
| -7 | Does not apply (spontaneous) | 9 |
6.9%
|
| 0 | Less than one day | 55 |
42.3%
|
| 1 | 26 |
20%
|
|
| 2 | 15 |
11.5%
|
|
| 3 | 7 |
5.4%
|
|
| 4 | 3 |
2.3%
|
|
| 5 | 2 |
1.5%
|
|
| 7 | 4 |
3.1%
|
|
| 10 | 1 |
0.8%
|
|
| 21 | 1 |
0.8%
|
|
| 30 | 1 |
0.8%
|
|
| Sysmiss | 344 |