Volume 28, Number 10—October 2022
Dispatch
Nosocomial COVID-19 Incidence and Secondary Attack Rates among Patients of Tertiary Care Center, Zurich, Switzerland
Table
Exposure | Exposed patients positive for SARS-CoV-2, n = 42 | Exposed patients not positive for SARS-CoV-2, n = 256 | OR (95%CI) |
|
---|---|---|---|---|
Univariable analysis | Multivariable analysis | |||
Contact time of index and exposed patient in hours, median (IQR) | 54 (28–96) | 17 (8–29) | 1.03 (1.02–1.03) | 1.02 (1.01–1.03) |
Ct value of index patient in units, median (IQR) | 19 (18–26) | 28 (19–33) | 0.91 (0.87–0.96) | 0.93 (0.87–0.98) |
AGP in index patient, mean (SD) | 0.26 (0.44) | 0.25 (0.43) | 1.04 (0.50–2.19) | NA |
Exposure on IMC/ICU, mean (SD) | 0.14 (0.35) | 0.31 (0.46) | 0.37 (0.15–0.92) | 0.70 (0.27–1.87) |
Male sex of index patient, mean (SD) | 0.55 (0.50) | 0.52 (0.50) | 1.08 (0.56–2.09) | NA |
Age of index patient, y, median (IQR) | 71 (58–77) | 72 (58–78) | 1.00 (0.98–1.02 | NA |
Exposure before mandatory patient masking at bed place, mean (SD) | 0.09 (0.28) | 0.11 (0.32) | 1.41 (0.50–3.96 | NA |
Calendar week into second and third waves, median (IQR) | 13 (9–17) | 13 (8–18) | 0.96 (0.91–1.01) | 0.95 (0.90–1.01) |
*AGP, aerosol-generating procedures; Ct, cycle threshold; IQR, interquartile range; IMC, intermediate care units; ICU, intensive care units; NA, not available; OR, odds ratio.
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Page updated: September 21, 2022
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