Baseline characteristics of school staff sample
| Variable | N* | Completed questionnaire (n=1689) | N* | Completed serology testing (n=1556) |
| Age (mean±SD) | 1684 | 45.4±10.4 | 1556 | 45.7±10.3 |
| Sex, % female, n (%) | 1681 | 1355 (80.6%) | 1550 | 1257 (81.1%) |
| Canadians of indigenous origin, n (%) | 1688 | 31 (1.8%) | 1555 | 31 (2.0%) |
| Ethnicity, n (%) | 1689 | 1556 | ||
| White, Caucasian | 1175 (69.6%) | 1084 (69.7%) | ||
| South Asian | 65 (3.9%) | 57 (3.7%) | ||
| Chinese | 277 (16.4%) | 257 (16.5%) | ||
| Black | 12 (0.7%) | 12 (0.8%) | ||
| Filipino | 35 (2.1%) | 33 (2.1%) | ||
| Latin American | 26 (1.5%) | 26 (1.7%) | ||
| Arab | 4 (0.2%) | 3 (0.2%) | ||
| Southeast Asian | 32 (1.9%) | 27 (1.7%) | ||
| West Asian | 1 (0.1%) | 1 (0.1%) | ||
| Korean | 11 (0.7%) | 9 (0.6%) | ||
| Japanese | 39 (2.3%) | 36 (2.3%) | ||
| Other/No answer | 62 (3.7%) | 57 (3.7%) | ||
| Classroom workers†, n (%) | 1688 | 1320 (78.2%) | 1555 | 1212 (77.9%) |
| Contact time with students (hours/week), median (IQR) | 1684 | 17.6 (5.0–25.0) | 1552 | 17.5 (4.6–25.0) |
| School level, n (%) | 1689 | 1556 | ||
| Elementary | 1076 (63.7%) | 992 (63.8%) | ||
| Secondary | 474 (28.1%) | 436 (28.0%) | ||
| Work at multiple levels | 55 (3.3%) | 48 (3.1%) | ||
| School district office only | 84 (5.0%) | 80 (5.1%) | ||
| No. of people living in household, median (IQR) | 1685 | 3 (2–4) | 1552 | 3 (2–4) |
| Living with an essential worker in household, n (%) | 1671 | 619 (37.0%) | 1541 | 565 (36.7%) |
| At least one comorbidity‡, n (%) | 1689 | 409 (24.2%) | 1556 | 379 (24.4%) |
| Smoker, n (%) | 1686 | 46 (2.7%) | 1553 | 41 (2.6%) |
| Travelled outside BC since 1 January 2020, n (%) | 1687 | 278 (16.5%) | 1554 | 252 (16.2%) |
*N with data available.
†Those who reported being a teacher, teacher librarian, resource teacher, student support worker or family and youth worker in response to the question: “What is your job title? (teacher, teacher librarian, resource teacher, student support worker, family and youth worker, administrator (principal, vice principal), administrative assistant, maintenance staff, school board office staff, other)”.
‡Any the following: hypertension, diabetes, asthma, chronic lung disease, chronic heart disease, chronic kidney disease, liver disease, cancer, chronic blood disorder, immunosuppressed, chronic neurological disorder.
BC, British Columbia.