| Value | Category |
|---|---|
| -222 | Interview declined |
| 1 | Biological mother |
| 2 | Biological father |
| 3 | Adoptive Mother |
| 4 | Adoptive father |
| 5 | Stepmother |
| 6 | Stepfather |
| 7 | Grandmother |
| 8 | Grandfather |
| 9 | Aunt |
| 10 | Uncle |
| 11 | Sister |
| 12 | Brother |
| 13 | Other relative |
| 14 | Non-relative |
| 15 | Refuse to answer |
| Sysmiss |