Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/22879
Title: Sociodemographic risk factors for coronavirus disease 2019 (COVID-19) infection among Massachusetts healthcare workers: A retrospective cohort study
Authors: Lan, Fan Yun 
Filler, Robert 
Mathew, Soni 
Buley, Jane 
Iliaki, Eirini 
Bruno-Murtha, Lou Ann 
Osgood, Rebecca 
Christophi, Costas A. 
Fernandez-Montero, Alejandro 
Kales, Stefanos N. 
Major Field of Science: Medical and Health Sciences
Field Category: Basic Medicine
Keywords: Nasopharyngeal Swabs;Serologic Tests;COVID-19
Issue Date: 2021
Source: Infection Control & Hospital Epidemiology, 2021
Journal: Infection Control & Hospital Epidemiology 
Abstract: Objective: To better understand coronavirus disease 2019 (COVID-19) transmission among healthcare workers (HCWs), we investigated occupational and nonoccupational risk factors associated with cumulative COVID-19 incidence among a Massachusetts HCW cohort. Design, setting, and participants: The retrospective cohort study included adult HCWs in a single healthcare system from March 9 to June 3, 2020. Methods: The SARS-CoV-2 nasopharyngeal RT-PCR results and demographics of the study participants were deidentified and extracted from an established occupational health, COVID-19 database at the healthcare system. HCWs from each particular job grouping had been categorized into frontline or nonfrontline workers. Incidence rate ratios (IRRs) and odds ratios (ORs) were used to compare subgroups after excluding HCWs involved in early infection clusters before universal masking began. A sensitivity analysis was performed comparing jobs with the greatest potential occupational risks with others. Results: Of 5,177 HCWs, 152 (2.94%) were diagnosed with COVID-19. Affected HCWs resided in areas with higher community attack rates (median, 1,755.2 vs 1,412.4 cases per 100,000; P < .001; multivariate-adjusted IRR, 1.89; 95% CI, 1.03–3.44 comparing fifth to first quintile of community rates). After multivariate adjustment, African-American and Hispanic HCWs had higher incidence of COVID-19 than non- Hispanic white HCWs (IRR, 2.78; 95% CI, 1.78–4.33; and IRR, 2.41, 95% CI, 1.42–4.07, respectively). After adjusting for race and residential rates, frontline HCWs had a higher IRR (1.73, 95% CI, 1.16–2.54) than nonfrontline HCWs overall, but not within specific job categories nor when comparing the highest risk jobs to others. Conclusions: After universal masking was instituted, the strongest risk factors associated with HCW COVID-19 infection were residential community infection rate and race.
URI: https://hdl.handle.net/20.500.14279/22879
ISSN: 15596834
DOI: 10.1017/ice.2021.17
Rights: This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence
Type: Article
Affiliation : Harvard University 
National Cheng Kung University 
Harvard University 
Cyprus University of Technology 
University of Navarra 
Publication Type: Peer Reviewed
Appears in Collections:Άρθρα/Articles

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