2.2. The Danish Civil Registration System (CRS)

The Danish healthcare system is publically funded. Data from hospitals are gathered in public registries linked with a unique personal identification number assigned to all inhabitants since 1968. The Danish Civil Registration System [7] is an administrative system containing individual information on the unique personal identification number, name, gender, date of birth, citizenship, identity of parents, place of residence, civil status, immigration and/or death. The CRS number is assigned to all persons with residential location in Denmark at birth or immigration.