| Value | Category |
|---|---|
| -9 | Don't know |
| -8 | Refused |
| -5 | Not applicable |
| -3 | Missing |
| 1 | Physically handicapped |
| 2 | Problems with sight, hearing or speech |
| 3 | Psychological or psychiatric disorder |
| 4 | HIV/AIDS |
| 5 | Epilepsy/ fits |
| 6 | Emphysema |
| 7 | Alzheimer's disease |
| 8 | Other |
| Sysmiss |