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SARS-CoV-2 Infection Rates Following Use of Regular Compared With Defective Respirators When Caring for COVID-19 Patients: A Retrospective Follow-up Study.

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Title: SARS-CoV-2 Infection Rates Following Use of Regular Compared With Defective Respirators When Caring for COVID-19 Patients: A Retrospective Follow-up Study.
Authors: Kolstad, Henrik A1,2 kolstad@clin.au.dk, Frydenberg, Morten1, Nielsen, Kent Jacob3, Schlünssen, Vivi4, Biering, Karin3, Kjærsgaard, Mona5, Vestergaard, Jesper Medom1, Würtz, Else Toft1, Pugdahl, Kirsten1, Würtz, Anne Mette Lund4, Hansen, Karoline Kærgaard1, Jespersen, Sanne6, Thomsen, Marianne Kragh5, Sørensen, Mette Marie6, Ellermann-Eriksen, Svend5, Redder, Jacob Dvinge7, Storgaard, Merete6
Source: Annals of Work Exposures & Health. Jan2023, Vol. 67 Issue 1, p141-146. 6p.
Subjects: Medical equipment reliability, COVID-19, Industrial safety, Confidence intervals, Mechanical ventilators, Retrospective studies, Disease incidence, Research funding, Descriptive statistics, Patient care, Polymerase chain reaction, Data analysis software, Longitudinal method
Abstract: Background There is strong observational evidence that respirators are highly effective in protecting the users from being infected with Middle East respiratory syndrome and severe acute respiratory syndrome coronavirus (SARS-CoV), but the evidence for SARS-CoV-2 during daily work is limited. This study utilized a subset of healthcare workers' temporary use of a new brand respirator with frequent defects when caring for coronavirus disease 2019 (COVID-19) patients to assess the protective effect of regular respirators against SARS-CoV-2 infection. Methods We retrospectively followed 463 participants wearing a regular respirator and 168 wearing the new brand respirator day-by-day when caring for COVID-19 patients until testing polymerase chain reaction positive for SARS-CoV-2 between 27th December 2020 and 14th January 2021. Results We observed seven and eight incident SARS-CoV-2-infected cases. This corresponded with daily infection rates of 0.2 and 0.5%, an incidence rate ratio of 0.4 [95% confidence interval (CI) 0.1; 1.0], and an incidence rate difference of 0.3% (95% CI −0.1; 0.8) when comparing a regular with the new brand respirator. Discussion We regard the new brand respirator a sham intervention, and this study thus provides further evidence for the protective effect of respirators when exposed to SARS-CoV-2 virus. [ABSTRACT FROM AUTHOR]
Copyright of Annals of Work Exposures & Health is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: SARS-CoV-2 Infection Rates Following Use of Regular Compared With Defective Respirators When Caring for COVID-19 Patients: A Retrospective Follow-up Study.
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  Data: <searchLink fieldCode="AR" term="%22Kolstad%2C+Henrik+A%22">Kolstad, Henrik A</searchLink><relatesTo>1,2</relatesTo><i> kolstad@clin.au.dk</i><br /><searchLink fieldCode="AR" term="%22Frydenberg%2C+Morten%22">Frydenberg, Morten</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Nielsen%2C+Kent+Jacob%22">Nielsen, Kent Jacob</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Schlünssen%2C+Vivi%22">Schlünssen, Vivi</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Biering%2C+Karin%22">Biering, Karin</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Kjærsgaard%2C+Mona%22">Kjærsgaard, Mona</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Vestergaard%2C+Jesper+Medom%22">Vestergaard, Jesper Medom</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Würtz%2C+Else+Toft%22">Würtz, Else Toft</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Pugdahl%2C+Kirsten%22">Pugdahl, Kirsten</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Würtz%2C+Anne+Mette+Lund%22">Würtz, Anne Mette Lund</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Hansen%2C+Karoline+Kærgaard%22">Hansen, Karoline Kærgaard</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jespersen%2C+Sanne%22">Jespersen, Sanne</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Thomsen%2C+Marianne+Kragh%22">Thomsen, Marianne Kragh</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Sørensen%2C+Mette+Marie%22">Sørensen, Mette Marie</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Ellermann-Eriksen%2C+Svend%22">Ellermann-Eriksen, Svend</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Redder%2C+Jacob+Dvinge%22">Redder, Jacob Dvinge</searchLink><relatesTo>7</relatesTo><br /><searchLink fieldCode="AR" term="%22Storgaard%2C+Merete%22">Storgaard, Merete</searchLink><relatesTo>6</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Annals+of+Work+Exposures+%26+Health%22">Annals of Work Exposures & Health</searchLink>. Jan2023, Vol. 67 Issue 1, p141-146. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Medical+equipment+reliability%22">Medical equipment reliability</searchLink><br /><searchLink fieldCode="DE" term="%22COVID-19%22">COVID-19</searchLink><br /><searchLink fieldCode="DE" term="%22Industrial+safety%22">Industrial safety</searchLink><br /><searchLink fieldCode="DE" term="%22Confidence+intervals%22">Confidence intervals</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+ventilators%22">Mechanical ventilators</searchLink><br /><searchLink fieldCode="DE" term="%22Retrospective+studies%22">Retrospective studies</searchLink><br /><searchLink fieldCode="DE" term="%22Disease+incidence%22">Disease incidence</searchLink><br /><searchLink fieldCode="DE" term="%22Research+funding%22">Research funding</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Patient+care%22">Patient care</searchLink><br /><searchLink fieldCode="DE" term="%22Polymerase+chain+reaction%22">Polymerase chain reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis+software%22">Data analysis software</searchLink><br /><searchLink fieldCode="DE" term="%22Longitudinal+method%22">Longitudinal method</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Background There is strong observational evidence that respirators are highly effective in protecting the users from being infected with Middle East respiratory syndrome and severe acute respiratory syndrome coronavirus (SARS-CoV), but the evidence for SARS-CoV-2 during daily work is limited. This study utilized a subset of healthcare workers' temporary use of a new brand respirator with frequent defects when caring for coronavirus disease 2019 (COVID-19) patients to assess the protective effect of regular respirators against SARS-CoV-2 infection. Methods We retrospectively followed 463 participants wearing a regular respirator and 168 wearing the new brand respirator day-by-day when caring for COVID-19 patients until testing polymerase chain reaction positive for SARS-CoV-2 between 27th December 2020 and 14th January 2021. Results We observed seven and eight incident SARS-CoV-2-infected cases. This corresponded with daily infection rates of 0.2 and 0.5%, an incidence rate ratio of 0.4 [95% confidence interval (CI) 0.1; 1.0], and an incidence rate difference of 0.3% (95% CI −0.1; 0.8) when comparing a regular with the new brand respirator. Discussion We regard the new brand respirator a sham intervention, and this study thus provides further evidence for the protective effect of respirators when exposed to SARS-CoV-2 virus. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Annals of Work Exposures & Health is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1093/annweh/wxac031
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        Text: English
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        PageCount: 6
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      – SubjectFull: Medical equipment reliability
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      – SubjectFull: Research funding
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