| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.7%
|
| -7 | Does not apply (spontaneous) | 1 |
0.8%
|
| 0 | Less than one day | 16 |
13.6%
|
| 1 | 17 |
14.4%
|
|
| 2 | 23 |
19.5%
|
|
| 3 | 21 |
17.8%
|
|
| 4 | 4 |
3.4%
|
|
| 5 | 7 |
5.9%
|
|
| 6 | 5 |
4.2%
|
|
| 7 | 11 |
9.3%
|
|
| 10 | 4 |
3.4%
|
|
| 14 | 3 |
2.5%
|
|
| 15 | 1 |
0.8%
|
|
| 21 | 2 |
1.7%
|
|
| 90 | 1 |
0.8%
|
|
| Sysmiss | 504 |