| fhid | Household identification number |
| fpno | Person number |
| pid | Cross-wave person identifier |
| pidp | Cross-wave person identifier (UKHLS) |
| fiviow5 | Interview outcome Wave 5 |
| fivievr | Ever interviewed |
| fhhmem | Household membership |
| fnewhy | New entrants – why living in HH |
| fnemnjn | New entrants – month joined HH |
| fneyrjn | New entrants – year joined HH |
| fivfio | Individual interview outcome |
| fivfho | Final household interview outcome |
| fiodc | Individual document check |
| fhgr2r | Relationship to reference person |
| fhgsex | Sex – HH grid |
| fhgbm | Month of birth – HH grid |
| fhgby | Year of birth – HH grid |
| fmastat | Marital status |
| fhgspn | PNO of spouse/partner |
| fhgemp | Employment status – HH Grid |
| fhgfno | PNO of father |
| fhgmno | PNO of mother |
| fhgra | Responsible adult |
| fage | Age at Date of Interview |
| fage12 | Age at 1.12.1996 |
| fbutype | Benefit Unit Type |
| fbuno | Benefit Unit Number |
| fnchild | Number of own children in household |
| fdepchl | Whether dependent child: DSS definition |
| fhoh | Conventional Head of Household Indicator |
| frach16 | Whether responsible adult for child |
| fagei | Imputation flag – FAGE and FAGE12 |
| flrwght | Longitudinal respondent weight |
| flewght | Longitudinal enumerated individual weight |
| fxrwght | X-sectional respondent weight |
| fxewght | X-sectional enumerated individual weight |
| fmovest | Individual mover status |
| fsampst | Sample membership status |
| fneyrjn4 | New entrants – year joined HH: 4 digit |
| fsppid | Cross-wave person identifier of spouse |
| ffpid | Cross-wave person identifier of father |
| fmpid | Cross-wave person identifier of mother |
| frapid | X-wave person identifier of resp. adult |
| fdistmov | Distance of residential move |
| fbuid | BU identifier |
| fecstat1 | Econ.Status BU (HBAI defn), i |
| fecstat2 | Econ.Status BU (HBAI defn), ii |
| ffamtype1 | BU type (HBAI defn) |
| ffamtype2 | Family type – new HBAI definition |
| fbutype_mod | benefit unit type |