COVID-19 exposure, personal protective equipment (PPE) and HCW infection
| No infection, n=1442 (70.69%) | COVID-19 infection, n=598 (29.31%) | Prevalence ratio (95% CI) | |
| Availability of PPE, n (row %) | |||
| Half of the time or less | 143 (55.21) | 116 (44.79) | REF |
| Most of the time | 568 (70.12) | 242 (29.88) | 0.67 (0.56 to 0.79) |
| All of the time | 731 (75.28) | 240 (24.72) | 0.55 (0.46 to 0.66) |
| Receipt of PPE training in past 6 months, n (row %) | |||
| No | 322 (64.14) | 180 (35.86) | REF |
| Yes | 1120 (72.82) | 418 (27.18) | 0.76 (0.66 to 0.87) |
| No of COVID-19 patients treated in the past 6 months, n (row %) | |||
| 1–10 patients | 407 (75.79) | 130 (24.21) | REF |
| 11–50 patients | 502 (70.60) | 209 (29.4) | 1.21 (1.01 to 1.47) |
| 51–100 patients | 234 (70.69) | 97 (29.31) | 1.21 (0.97 to 1.52) |
| >100 patients | 197 (60.43) | 129 (39.57) | 1.63 (1.34 to 2.00) |
| Percentage of working hours put in close contact with COVID-19 patients, n (row %) | |||
| Less than 25% | 529 (75.36) | 173 (24.64) | REF |
| 25%–50% of the time | 312 (71.23) | 126 (28.77) | 1.17 (0.96 to 1.42) |
| Over 50% of the time | 511 (65.18) | 273 (34.82) | 1.41 (1.20 to 1.66) |
| Present during an aerosolising procedure, n (row %) | |||
| No | 559 (72.22) | 215 (27.78) | REF |
| Yes | 752 (69.63) | 328 (30.37) | 1.09 (0.95 to 1.26) |
| Unsure | 88 (67.69) | 42 (32.31) | 1.16 (0.88 to 1.53) |
HCWs, healthcare workers.