Characteristics of participants
| Characteristic | Test result; no. (%) of participants* | ||
|---|---|---|---|
| Overall n = 2128 | Positive n = 53 | Negative n = 2075 | |
| Age, median (IQR), yr | 48 (37–57) | 49 (40–58) | 48 (37–57) |
| Sex | |||
| Female | 808 (38.0) | 9 (17.0) | 799 (38.5) |
| Male | 1320 (62.0) | 44 (83.0) | 1276 (61.5) |
| Self-reported ethnicity | |||
| White | 926 (43.5) | 4 (7.5) | 922 (44.4) |
| Asian | 444 (20.9) | 17 (32.1) | 427 (20.6) |
| Black | 295 (13.9) | 21 (39.6) | 274 (13.2) |
| Hispanic | 204 (9.6) | 6 (11.3) | 198 (9.5) |
| Indigenous | 4 (0.2) | 0 (0.0) | 4 (0.2) |
| Mixed | 17 (0.8) | 0 (0.0) | 17 (0.8) |
| Other/not disclosed | 238 (11.2) | 5 (9.4) | 233 (11.2) |
| Employment status | |||
| Full-time | 2018 (94.8) | 51 (96.2) | 1967 (94.8) |
| Part-time or occasional | 110 (5.2) | 2 (3.8) | 108 (5.2) |
| Reported health factor | |||
| Any† | 447 (21.0) | 8 (15.1) | 439 (21.2) |
| Hypertension | 214 (10.0) | 4 (7.5) | 210 (10.1) |
| Diabetes | 151 (7.1) | 4 (7.5) | 147 (7.1) |
| Chronic respiratory condition | 64 (3.0) | 1 (1.9) | 63 (3.0) |
| Heart disease | 31 (1.4) | 0 (0.0) | 31 (1.5) |
| Other | 99 (4.6) | 1 (1.9) | 98 (4.7) |
| None | 1681 (79.0) | 45 (85.) | 1636 (78.8) |
| Reported smoking | |||
| Never smoker | 1668 (78.4) | 46 (86.8) | 1622 (78.2) |
| Current smoker | 331 (15.6) | 5 (9.4) | 326 (15.7) |
| Former smoker | 129 (6.1) | 2 (3.8) | 127 (6.1) |
| Previous SARS-CoV-2 test history‡ | |||
| Never tested | 1155 (54.3) | 42 (79.2) | 1113 (53.6) |
| All test results negative | 882 (41.4) | 9 (17.0) | 873 (42.1) |
| Any test result positive | 91 (4.3) | 2 (3.8) | 89 (4.3) |
| Feeling on day of testing§ | |||
| “Fine, same as any other day” | 2098 (98.6) | 51 (96.2) | 2047 (98.6) |
| “Not my best today” | 30 (1.4) | 2 (3.8) | 28 (1.3) |
| Business sector | |||
| Manufacturing/supplier | 1225 (57.6) | 43 (81.1) | 1182 (57.0) |
| Meat processing | 183 (8.6) | 6 (11.3) | 177 (8.5) |
| Childcare | 113 (5.3) | 3 (5.7) | 110 (5.3) |
| Other | 607 (28.5) | 1 (1.9) | 606 (29.2) |
| Business size, no. of participants | |||
| 1–5 | 44 (2.1) | 1 (1.9) | 43 (2.1) |
| 6–10 | 113 (5.3) | 2 (3.8) | 111 (5.3) |
| 11–20 | 388 (18.2) | 1 (1.9) | 387 (18.6) |
| 21–50 | 350 (16.4) | 0 (0.0) | 350 (16.9) |
| ≥ 51 | 1233 (57.9) | 49 (92.4) | 1184 (57.1) |