| Value | Category | Cases | |
|---|---|---|---|
| -999 | Don't know | 0 |
0%
|
| -888 | Refuse to answer | 0 |
0%
|
| -666 | Other (please specify) | 10 |
2%
|
| 1 | Medical condition | 480 |
94.5%
|
| 2 | Accident | 18 |
3.5%
|
| 11 | .D | 2 | |
| Sysmiss | 17732 |