Demographic variables describe the basic socio-economic situation of participants.
In Lifelines, the demographic section is organized in the following subsections:

1. Default variables
2. Education
3. Employment status
4. Family composition
5. Household composition
6. Income
7. Multiple births
8. Municipal codes
9. Nationality & ethnicity
10. Personal data
11. Profession (→ job codes)
12. Occupational history
13. Work & income (Covid-19)
14. Sex & gender