| Value | Category |
|---|---|
| 1 | Mother |
| 2 | Father |
| 3 | Grandparent |
| 4 | Sibling |
| 5 | Other relative |
| 6 | Other non- relative |
| 2147483622 | Don't know |
| 2147483623 | Refused to answer |
| 2147483624 | Outlier set to missing |
| 2147483625 | Inconsistency set to missing |
| 2147483647 | Not applicable |
| 11 | .Z |