Demographic variables
| Demographic variables | Operationalisation |
|---|---|
| Age | Years |
| Gender | Male/female |
| Ethnicity | Country of birth, country of birth parents |
| Age of migration | If applicable |
| Ethnic density | Postal code (first 4 figures) |
| Previous mental healthcare | If yes: diagnosis |
| Previous/current medication | (free text words) |
| Social economic status | Income |
| Education | (free text words) |
| Religion | How important is religion for you? (Likert scale) |
| Substance use | First 3 questions of the Drug Use Disorders Identification Test (DUDIT)+question on kind of substance used |