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Nationality & Ethnicity

The following questions regarding nationality and ethnicity (section: Demographics) of Lifelines participants were asked:
Additionally, by linking BRP and CBS data, the Province of birth has been generated.

Questions English	Questions Dutch	Code	Variable	Assessment	Age	IO
in what country were you born?	in welk land bent u geboren?	birthplace_country_adu_q_1	demo4a	1A Proxy	18+
country other than the netherlands: / in what country were you born?	ander land dan nederland, nl: / in welk land bent u geboren?	birthplace_country_adu_q_1_a	demo4b	1A Proxy	18+	X
in what city did you live the first months of your life?	in welke plaats woonde u de eerste maanden van uw leven?	birthplace_city_adu_q_1	demo4c	1A	18+	X
in what country was your (biological) mother born?	in welk land is uw biologische moeder geboren?	birthplace_mother_fam_q_1	demo5a	1A Proxy	18+
country other than the netherlands: / in what country was your (biological) mother born?	ander land dan nederland, nl: / in welk land is uw biologische moeder geboren?	birthplace_mother_fam_q_1_a	demo5b	1A Proxy	18+	X
in what city did your biological mother live during the first months of her life?	in welke plaats woonde uw biologische moeder de eerste maanden van haar leven?	birthplace_mother_fam_q_1_b	demo5c	1A	18+	X
in what country was your (biological) father born?	in welk land is uw biologische vadergeboren?	birthplace_father_fam_q_1	demo6a	1A Proxy	18+
country other than the netherlands: / in what country was your (biological) father born?	ander land dan nederland, nl: / in welk land is uw biologische vader geboren?	birthplace_father_fam_q_1_a	demo6b	1A Proxy	18+	X
in what city did your biological father live during the first months of his life?	in welke plaats woonde uw biologische vader de eerste maanden van zijn leven?	birthplace_father_fam_q_1_b	demo6c	1A	18+	X
which of the following populations do you consider yourself belonging to?	tot welke van onderstaande bevolkingsgroepen rekent u zichzelf?	ethnicity_category_adu_q_1	race	1B	18+
race, other: / which of the following populations do you consider yourself belonging to?	ras, anders: / tot welke van onderstaande bevolkingsgroepen rekent u zichzelf?	ethnicity_category_adu_q_1_a	race_txt	1B	18+
what is your migration status?	Wat is uw migratiestatus?	covt26_migration_adu_q_1	covid426	COVQ 26	18+

Ethnicity frequency

Frequencies regarding the answers to the question: “Which of the following populations do you consider yourself belonging to?”, as established at baseline:

Race	Frequency	Percentage
White/East and West European	121239	98%
White/Mediterranean or Arabic	432	0.3%
Black	201	0.2%
Asian	613	0.5%
Other, namely:	1248	1%
Total	123733	100%

Birth country of participants

Frequencies regarding the answers to the question: “In what country were you born?“ and the specification in case this was a “Country other than The Netherlands”.

Age	Netherlands	Europe	Africa	Other
≥ 18 years at baseline	148.528	1.948	382	2.359
<18 years at baseline	9954	65	17	46

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Nationality & Ethnicity

Ethnicity frequency

Birth country of participants