TABLE 3.
Accumulated Incidence of COVID-19 Cases by 1000 HCP in the Preintervention and Intervention Periods Regarding the Declaration of the SA, March 12–31, 2020 (n = 127), and the Order for Continuous Use of a Surgical Mask, March 16 to April 4, 2020 (n = 119), AUGH, Spain
| Intervention Period Incidence | Preintervention Period Incidence | RR (95% CI) | AR (95% CI) | |||
|---|---|---|---|---|---|---|
| ‰ | n | ‰ | n | |||
| SA | ||||||
| Total (n = 127) | 14.6 | 57 | 17.9 | 70 | 0.81 (0.57 to 1.15) | −0.003 (−0.009 to −0.002) |
| Healthcare associated (n = 18) | 3.6 | 14 | 1.0 | 4 | 3.53 (1.15 to 10.62) | 0.002 (0.000 to 0.005) |
| Workplace social interactions (n = 75) | 7.7 | 30 | 11.5 | 45 | 0.67 (0.42 to 1.06) | −0.004 (−0.008 to 0.000) |
| Other social interactions (n = 34) | 3.3 | 13 | 5.3 | 21 | 0.62 (0.31 to 1.23) | −0.002 (−0.005 to 0.000) |
| Continuous use of surgical masks | ||||||
| Total (n = 119) | 8.2 | 32 | 22.3 | 87 | 0.37 (0.25 to 0.55) | −0.014 (−0.020 to −0.009) |
| Healthcare associated (n = 22) | 1.8 | 7 | 3.8 | 15 | 0.47 (0.20 to 1.14) | −0.002 (−0.004 to 0.000) |
| Workplace social interactions (n = 66) | 4.4 | 17 | 12.6 | 49 | 0.35 (0.20 to 0.60) | −0.008 (−0.012 to −0.004) |
| Other social interactions (n = 31) | 2.1 | 8 | 5.9 | 23 | 0.35 (0.16 to 0.78) | −0.004 (−0.007 to −0.001) |