Association between self-reported masking behavior and SARS-CoV-2 infection wanes from Pre-Delta to Omicron-predominant periods — North Carolina COVID-19 Community Research Partnership (NC-CCRP) - 16/02/23
, Michael Gibbs, MD b, Michael Runyon, MD b, William S. Weintraub, MD c, Yhenneko J. Taylor, PhD d, Sharon L. Edelstein, ScM athe COVID-19 Community Research Partnership Study Group⁎⁎
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Abstract |
Background |
Wearing a face mask is a primary public health method to reduce SARS-CoV-2 transmission.
Methods |
We performed a nested case-control analysis within the North Carolina COVID-19 Community Research Partnership (NC-CCRP) of adults who completed daily surveillance surveys, April 2020 - February 2022. We assessed the association between self-reported mask wearing behavior during nonhousehold interactions and COVID-19 infection during 3 pandemic periods using conditional logistic regression models of risk of infection that were adjusted for demographics, vaccination status, and recent known exposure to COVID-19.
Results |
Among 3,901 cases and 27,813 date-matched controls, there was a significant interaction between mask use and time period (P < .001). Prior to July 2021, the odds of a reported infection were 66% higher (aOR = 1.66, 95% CI = 1.43-1.91) among participants reporting ≥1 day not wearing a mask compared to those who reported no days (1,592 cases, 11,717 controls). During the Delta-predominant period, the results were similar (aOR = 1.53, 95% CI = 1.23-1.89; 659 cases, 4,649 controls). This association was attenuated during the Omicron-predominant period, where odds of an infection was 16% higher (aOR = 1.16, 95% CI = 1.03-1.32; 1,563 cases, 10,960 controls).
Conclusions |
While the effect of not wearing a mask remains significant, during the Omicron-predominant period we observed a decrease in the association between self-reported mask wearing and risk of SARS-CoV-2 infection.
Le texte complet de cet article est disponible en PDF.Key words : Mask use, Epidemiology, Infection prevention and control
Plan
| Funding/support: This publication was supported by the Centers for Disease Control and Prevention (CDC) [Contract #75D30120C08405] and the CARES (Coronavirus Aid, Relief, and Economic Security) Act of the U.S. Department of Health and Human Services (HHS) [Contract # NC DHHS GTS #49927]. |
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| Conflicts of interest: The authors declare that they have no relevant competing interests. |
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| Author contributions: A.H.T. and S.L.E. had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Concept and design: All authors. Acquisition, analysis, or interpretation of data: All authors. Drafting of the manuscript: A.H.T., S.L.E. Critical revision of the manuscript for important intellectual content: All authors. Statistical analysis: A.H.T. |
Vol 51 - N° 3
P. 261-267 - mars 2023 Retour au numéro
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