| pid | Cross-wave person identifier |
| pidp | Cross-wave person identifier (UKHLS) |
| nhid | household identification number |
| npno | person number |
| niviolw | interview outcome prev wave |
| nivstat1 | interview status: previous waves |
| nivelig | whether permanent sample member |
| nhhmem | household membership |
| nnewhy | new entrants – why living in hh |
| nnemnjn | new entrants – month joined hh |
| nneyrjn4 | new entrants – year joined hh |
| nlvwhy | leavers – why left |
| nlvmn | leavers – month left |
| nlvyr4 | leavers – year left |
| nlvloc | leavers – new location |
| nivfio | individual interview outcome |
| nivrref | reason for interview refusal |
| nivireis | re-issued to field |
| nfinloc | final sample location identification |
| nivfho | final household interview outcome |
| nmemorig | sample origin |
| nsampst | Sample membership status |
| nmovest | individual mover status |
| nlewght | longitudinal enumerated individual weigh |
| nlrwght | longitudinal respondent weight |
| nlrwtsw1 | longit’l resp. weight inc scot-welsh |
| nlewtsw1 | longit’l enum. weight inc. scot-welsh |
| nlrwtsw2 | longit’l resp. weight only scot-welsh |
| nlewtsw2 | longit’l enum. weight only scot-welsh |
| nlrwtuk1 | longit’l resp. weight inc all samples |
| nlewtuk1 | longit’l enum. weight inc all samples |
| nlrwtuk2 | longit’l resp. weight within uk estimate |
| nlewtuk2 | longit’l enum. weight within uk estimate |
| ndistmov | distance of residential move |