The majority and minority groups were derived from respondents’, parents’ and grandparents’ country of birth [16]. Participants were assigned to the German majority if neither they nor their parents or grandparents were born outside Germany (54.2%). Remaining participants were assigned to one of four categories: Former Soviet Union and Central and Eastern Europe (FSU/CEE, 18.4%); Turkey, the Middle East and Africa (Turkey/ME/Africa, 14.4%); Other European countries and the Americas (Other European/Americas, 9.3%); and Asia (2.3%). No information was available for 1.5% of the sample. These categories were chosen to reflect potential heterogeneity among minority groups regarding pandemic-related stressors, socioeconomic positioning and migration reasons, while maintaining sufficiently large cell sizes. See Additional file 1 for detailed information about countries of origin in each category.
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