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

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