| rhid | household identification number |
| rpno | ego’s person number |
| ropno | alter’s person number |
| rrel | relationship of lopno to lpno |
| rsex | sex |
| rosex | alter’s sex |
| rlwstat | alter’s residence at last wave |
| pid | cross-wave person identifier |
| pidp | Cross-wave person identifier (UKHLS) |
| ropid | alter’s cross-wave person identifier |