| 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 |