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.