| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
28%
|
| -7 | Does not apply (spontaneous) | 1 |
4%
|
| 0 | Less than one day | 0 |
0%
|
| 1 | 7 |
28%
|
|
| 2 | 4 |
16%
|
|
| 3 | 4 |
16%
|
|
| 11 | 1 |
4%
|
|
| 37 | 1 |
4%
|
|
| Sysmiss | 994 |