Table 1

Participant profile of BC-Mix baseline data (n=41 375), 4 September 2020–26 July 2021

	Survey				British Columbia population
	Unweighted frequency	Unweighted % (excl missing)	Weighted frequency	Weighted %	Population frequency	Population %
Sex
Male	6823	16.5	21 293	50.0	1 805 105	48.5
Female	34 552	83.5	21 261	50.0	1 914 755	51.5
Missing
Age
18–34	4978	12.0	11 575	27.2	1 002 745	27
35–54	12 110	29.3	14 194	33.4	1 251 835	33.7
55+	24 287	58.7	16 784	39.4	1 465 280	39.4
Race/ethnicity
Indigenous	1757	4.4	2180	5.3	186 705	5
Chinese	882	2.2	4451	10.9	418 035	11.2
White	35 026	87.5	26 383	64.6	2 448 155	65.8
South Asian	606	1.5	3473	8.5	280 470	7.5
Other	1766	4.4	4352	10.7	386 495	10.4
Missing/unknown	1338	n/a	n/a	n/a	n/a	n/a
Health region
Fraser Health	8451	26.1	11 793	36.2	1 347 410	36.2
Interior Health	6143	19.0	5336	16.4	595 105	16
Northern Island	1825	5.6	1828	5.6	213 235	5.7
Vancouver Coastal	7315	22.6	8118	24.9	934 055	25.1
Vancouver Island	8640	26.7	5535	17.0	630 055	16.9
Missing/unknown	9001	n/a	n/a	n/a	n/a	n/a
Education
Below high school	807	2.5	1096	3.0	2 301 030	12.5
Below bachelor	16 928	51.7	15 176	47.0	466 295	61.9
University degree	15 029	45.9	16 273	50.0	952 535	25.6
Missing/unknown	8611	n/a	n/a	n/a	n/a	n/a
Employment status
Employed full time (30 hours or more/week)	10 654	32.0	13 608	40.8	n/a	n/a
Employed part time	2993	9.0	3131	9.4	n/a	n/a
Self-employed	2704	8.1	3013	9.0	n/a	n/a
Unemployed but looking for a job	952	2.9	1522	4.6	n/a	n/a
Unemployed and not looking for a job	406	1.2	510	1.5	n/a	n/a
Full-time parent, homemaker	879	2.6	740	2.2	n/a	n/a
Retired	12 757	38.3	8096	24.3	n/a	n/a
Student/pupil	566	1.7	1197	3.6	n/a	n/a
Long-term sick or disabled	968	2.9	914	2.7	n/a	n/a
Prefer not to answer	424	1.3	619	1.9	n/a	n/a
Missing/unknown	8072	n/a	n/a	n/a	n/a	n/a
Material Deprivation Index
1 (privileged)	6407	22.3	6100	21.8	n/a	n/a
2	6475	22.5	5873	21.1	n/a	n/a
3	6972	24.2	6010	21.6	n/a	n/a
4	4822	16.8	5187	18.7	n/a	n/a
5 (deprived)	4085	14.2	4656	16.8	n/a	n/a
Missing	1,2614	n/a	n/a	n/a	n/a	n/a
Follow-up consent
Yes	20 633	63.8	19 051	58.9	n/a	n/a
No	11 689	36.2	13 275	41.1	n/a	n/a
Missing	9053	n/a	n/a	n/a	n/a	n/a
Data linkage consent
Yes	7290	27.3	7318	26.4	n/a	n/a
No	19 467	72.8	20 362	73.6	n/a	n/a
Missing	14 618	n/a	n/a	n/a	n/a	n/a

BC-Mix, BC COVID-19 Population Mixing Patterns Survey; n/a, not applicable.