| khid | Household identification number |
| kpno | Person number |
| pid | Cross-wave person identifier |
| pidp | Cross-wave person identifier (UKHLS) |
| kiviolw | Interview outcome prev wave |
| kivstat1 | Interview status: previous waves |
| khhmem | Household membership |
| knewhy | New entrants – why living in HH |
| knemnjn | New entrants – month joined HH |
| kneyrjn4 | New entrants – year joined HH |
| kivfio | Individual interview outcome |
| kivfho | Final household interview outcome |
| kiodc | Individual document check |
| kmemorig | Sample Origin |
| khgr2r | Relationship to reference person |
| khgsex | Sex – HH grid |
| khgbm | Month of birth – HH grid |
| khgby | Year of birth – HH grid |
| kmastat | Marital status |
| khgspn | PNO of spouse/partner |
| khgemp | Employment status – HH Grid |
| khgfno | PNO of father |
| khgmno | PNO of mother |
| khgra | Responsible adult |
| kage | Age at Date of Interview |
| kage12 | Age at 1.12.2001 |
| kbutype | Benefit Unit Type |
| kbuno | Benefit Unit Number |
| knchild | Number of own children in household |
| kdepchl | Whether dependent child: DSS definition |
| khoh | Conventional Head of Household Indicator |
| krach16 | Whether responsible adult for child |
| kagei | Imputation flag – KAGE and KAGE12 |
| klrwght | Longitudinal respondent weight |
| klewght | Longitudinal enumerated individual weight |
| kxrwght | X-sectional respondent weight |
| kxewght | X-sectional enumerated individual weight |
| kmovest | Individual mover status |
| ksampst | Sample membership status |
| kxrwghte | ECHP X-sectional respondent weight |
| kxewghte | ECHP X-sectional enumerated weight |
| kxrwtuk1 | X-sect’l resp. weight inc all samples |
| kxewtuk1 | X-sect’l enum. weight inc all samples |
| kxrwtuk2 | X-sect’l resp. weight within UK estimates |
| kxewtuk2 | X-sect’l enum. weight within UK estimates |
| klrwtsw1 | Longit’l resp. weight inc Scot-Welsh |
| klewtsw1 | Longit’l enum. weight inc. Scot-Welsh |
| klrwtsw2 | Longit’l resp. weight only Scot-Welsh |
| klewtsw2 | Longit’l enum. weight only Scot-Welsh |
| ksppid | Cross-wave person identifier of spouse |
| kfpid | Cross-wave person identifier of father |
| kmpid | Cross-wave person identifier of mother |
| krapid | X-wave person identifier of resp. adult |
| kdistmov | Distance of residential move |
| kbuid | BU identifier |
| kecstat1 | Econ.Status BU (HBAI defn), i |
| kecstat2 | Econ.Status BU (HBAI defn), ii |
| kfamtype1 | BU type (HBAI defn) |
| kfamtype2 | Family type – new HBAI definition |
| kbutype_mod | benefit unit type |