| mhid | Household identification number |
| mfid | Fieldwork household identifier |
| mivnadd | Household found at new address in field |
| mivia | Interviewer area |
| miviam | Area intrvw took place non-local movers |
| mivid | Interviewer number |
| mivlnc | Total calls at last known address |
| mivtnc | Total calls at interview address |
| mnelocly | NI unlisted resident |
| mivfho | Final household interview outcome |
| mivosmrh | No. OSMs – whole HH refusal to intervwr |
| mivnsmrh | No. new HH membs – whl HH ref to intvwr |
| mivrrefh | Reason for household refusal |
| mivconv | Refusal conversion attempted |
| mivreis | Re-issued to field |
| mivisst | Coversheet issue status |
| mhhdc | Document check – h/hold quest’re comp? |
| mhhorig | Sample origin |
| mxhwght | Household Weight |
| mregion | Region / Metropolitan area |
| mhhmove | Mover household indicator |
| ahid | Household identification number – Wave 1 |
| mxhwtuk1 | Household weight -inc all samples |
| mxhwtuk2 | Household weight within UK estimates |
| mstrata | Stratification class |
| mpsu | Primary Sampling Unit |
| mregion2 | Government Office Region |