COVID-19 seropositivity, work conditions and exposure to patients with COVID-19
| Levels | HCWs in the sample | Seropositive HCWs | % positivity (95% CI) | P value* |
| Activity rate | ||||
| Full-time | 1032 | 94 | 9.1 (7.4 to 11.0) | 0.14 |
| Part-time (<100%) | 842 | 94 | 11.2 (9.1 to 13.5) | |
| Daily contact with patients | ||||
| Yes | 1135 | 117 | 10.3 (8.6 to 12.2) | 0.64 |
| No | 739 | 71 | 9.6 (7.6 to 12.0) | |
| Place of daily contact with patients | ||||
| Reception (among N=1135) | ||||
| Yes | 252 | 36 | 14.3 (10.2 to 19.2) | 0.025 |
| No | 883 | 81 | 9.2 (7.4 to 11.3) | |
| Waiting room (among N=1135) | ||||
| Yes | 281 | 37 | 13.2 (9.4 to 17.7) | 0.071 |
| No | 854 | 80 | 9.4 (7.5 to 11.5) | |
| Patient rooms (among N=1135) | ||||
| Yes | 720 | 86 | 11.9 (9.7 to 14.5) | 0.019 |
| No | 415 | 31 | 7.5 (5.1 to 10.4) | |
| Consultation box (outpatient examination rooms) (among N=1135) | ||||
| Yes | 475 | 45 | 9.5 (7.0 to 12.5) | 0.49 |
| No | 660 | 72 | 10.9 (8.6 to 13.5) | |
| Intervention rooms (among N=1135) | ||||
| Yes | 198 | 27 | 13.6 (9.2 to 19.2) | 0.095 |
| No | 937 | 90 | 9.6 (7.8 to 11.7) | |
| Other places (among N=1135) | ||||
| Yes | 227 | 17 | 7.5 (4.4 to 11.7) | 0.14 |
| No | 908 | 100 | 11.0 (9.1 to 13.2) | |
| Direct contact with patient with COVID-19 | ||||
| Yes | 742 | 77 | 10.4 (8.3 to 12.8) | 0.69 |
| No | 1132 | 111 | 9.8 (8.1 to 11.7) | |
| Work in COVID-19 unit | ||||
| Yes | 349 | 37 | 10.6 (7.6 to 14.3) | 0.69 |
| No | 1525 | 151 | 9.9 (8.4 to 11.5) | |
| Intensive care (among N=349) | ||||
| Yes | 170 | 13 | 7.6 (4.1 to 12.7) | 0.085 |
| No | 179 | 24 | 13.4 (8.8 to 19.3) | |
| Continuous care (among N=349) | ||||
| Yes | 71 | 9 | 12.7 (6.0 to 22.7) | 0.52 |
| No | 278 | 28 | 10.1 (6.8 to 14.2) | |
| Ward (among N=349) | ||||
| Yes | 174 | 21 | 12.1 (7.6 to 17.9) | 0.39 |
| No | 175 | 16 | 9.1 (5.3 to 14.4) | |
| Ambulatory screening (among N=349) | ||||
| Yes | 34 | 3 | 8.8 (1.9 to 23.7) | >0.99 |
| No | 315 | 34 | 10.8 (7.6 to 14.8) | |
| Use of hydroalcoholic solution at work | ||||
| Yes | 1236 | 113 | 9.1 (7.6 to 10.9) | 0.088 |
| No | 638 | 75 | 11.8 (9.4 to 14.5) | |
Breslow tests for homogeneity among work categories do not reject homogeneity in all cases; Cochran-Mantel-Haenzel stratified by work category is consistent with Fisher’s exact test.
*Fisher’s exact test.
HCWs, healthcare workers.