Volume 27, Number 9—September 2021
Research
Risk for Acquiring Coronavirus Disease Illness among Emergency Medical Service Personnel Exposed to Aerosol-Generating Procedures
Aubrey Brown, Leilani Schwarcz, Catherine R. Counts, Leslie M. Barnard, Betty Y. Yang, Jamie M. Emert, Andrew Latimer, Christopher Drucker, John Lynch, Peter J. Kudenchuk, Michael R. Sayre, and Thomas Rea
Table 3
Incidence of COVID-19 among EMS providers by COVID-19 patient encounter and AGP status cohort, King County, Washington, February 16–July 31, 2020*
| Cohort | COVID-19 patient encounter | 2–14 d exposure window | AGP status | EMS provider COVID-19 infection | Person-days at risk | Incidence/10,000 person-days (95% CI) | IRR (95% CI) |
|---|---|---|---|---|---|---|---|
| 1 | Yes | Yes | Yes | 1 | 8,582 | 1.17 (0.03–6.49) | 1.64 (0.22–12.26) |
| 2 | Yes | Yes | No | 0 | 26,583 | 0 (0.0–1.39) | 0 (0.0–1.50) |
| 3 | Yes | No | NA | 18 | 252,867 | 0.71 (0.42–1.13) | Referent |
| 4 |
Never |
NA |
NA |
11 |
240,245 |
0.46 (0.23–0.82) |
0.64 (0.30–1.36) |
| Post hoc | |||||||
| 1 and 2 | Yes | Yes | Y/N | 1 | 35,165 | 0.28 (0.01–1.58) | 0.40 (0.05–2.99) |
*AGP, aerosol generating procedure; COVID-19, coronavirus disease; EMS, emergency medical service; IRR, incidence rate ratio; NA, not available
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