Table 1.
Participant characteristics
| Total | Doctors | Nurses | Radiographers | Administrators | |
|---|---|---|---|---|---|
| Number | 434 | 92 | 253 | 45 | 44 |
| Median age, years (range) | 40 (19–66) | 42 (25–63) | 39 (21–65) | 33 (19–57) | 47.5 (24–66) |
| Female | 356 (82%) | 49 (53.3%) | 227 (89.7%) | 39 (86.7%) | 41 (93.2%) |
| Male | 78 (18%) | 43 (46.7%) | 26 (10.3%) | 6 (13.3%) | 3 (6.8%) |
| Smoker | 37 (8.5%) | 2 (2.1%) | 22 (8.7%) | 2 (4.4%) | 11 (25%) |
| Underlying health condition | 103 (23.7%) | 15 (16.3%) | 60 (23.7%) | 14 (31.1%) | 14 (31.8%) |
| Previously symptomatic healthcare professionals | |||||
| Prior symptoms suggestive of COVID-19 | 114/434 (26.3%) | 31/92 (33.7%) | 65/253 (25.7%) | 8/45 (17.8%) | 10/44 (22.7%) |
| Median symptom duration in days (range) | 7.5 (1–61) | 7 (1–61) | 8 (1–48) | 7 (2–20) | 8 (1–37) |
| Median time (days) from symptom resolution to sample collection (range) | 67 (1–172) | 70 (1–169) | 67 (8–172) | 63 (28–139) | 69 (12–94) |
| Pre-study SARS-CoV-2 PCR test | 178/434 (41%) | 46/92 (50%) | 108/253 (42.7%) | 15/45 (33.3%) | 9/44 (20.5%) |
| Pre-study positive PCR test | 6/178 (3.4%) | 3/46 (6.5%) | 3/108 (2.7%) | 0/15 | 0/9 |
| Previously asymptomatic healthcare professionals | |||||
| Asymptomatic during pandemic | 320/434 (73.7%) | 61/92 (66.3%) | 188/253 (74.3%) | 37/45 (82.2%) | 34/44 (77.3%) |
| Asymptomatic, but household member possibly symptomatic | 47/320 (14.7%) | 11/61 (18%) | 27/188 (14.4%) | 3/37 (8.1%) | 6/34 (17.6%) |
PCR, polymerase chain reaction.