eLife (Aug 2020)

Differential occupational risks to healthcare workers from SARS-CoV-2 observed during a prospective observational study

  • David W Eyre,
  • Sheila F Lumley,
  • Denise O'Donnell,
  • Mark Campbell,
  • Elizabeth Sims,
  • Elaine Lawson,
  • Fiona Warren,
  • Tim James,
  • Stuart Cox,
  • Alison Howarth,
  • George Doherty,
  • Stephanie B Hatch,
  • James Kavanagh,
  • Kevin K Chau,
  • Philip W Fowler,
  • Jeremy Swann,
  • Denis Volk,
  • Fan Yang-Turner,
  • Nicole Stoesser,
  • Philippa C Matthews,
  • Maria Dudareva,
  • Timothy Davies,
  • Robert H Shaw,
  • Leon Peto,
  • Louise O Downs,
  • Alexander Vogt,
  • Ali Amini,
  • Bernadette C Young,
  • Philip George Drennan,
  • Alexander J Mentzer,
  • Donal T Skelly,
  • Fredrik Karpe,
  • Matt J Neville,
  • Monique Andersson,
  • Andrew J Brent,
  • Nicola Jones,
  • Lucas Martins Ferreira,
  • Thomas Christott,
  • Brian D Marsden,
  • Sarah Hoosdally,
  • Richard Cornall,
  • Derrick W Crook,
  • David I Stuart,
  • Gavin Screaton,
  • Oxford University Hospitals Staff Testing Group,
  • Timothy EA Peto,
  • Bruno Holthof,
  • Anne-Marie O'Donnell,
  • Daniel Ebner,
  • Christopher P Conlon,
  • Katie Jeffery,
  • Timothy M Walker

DOI
https://doi.org/10.7554/eLife.60675
Journal volume & issue
Vol. 9

Abstract

Read online

We conducted voluntary Covid-19 testing programmes for symptomatic and asymptomatic staff at a UK teaching hospital using naso-/oro-pharyngeal PCR testing and immunoassays for IgG antibodies. 1128/10,034 (11.2%) staff had evidence of Covid-19 at some time. Using questionnaire data provided on potential risk-factors, staff with a confirmed household contact were at greatest risk (adjusted odds ratio [aOR] 4.82 [95%CI 3.45–6.72]). Higher rates of Covid-19 were seen in staff working in Covid-19-facing areas (22.6% vs. 8.6% elsewhere) (aOR 2.47 [1.99–3.08]). Controlling for Covid-19-facing status, risks were heterogenous across the hospital, with higher rates in acute medicine (1.52 [1.07–2.16]) and sporadic outbreaks in areas with few or no Covid-19 patients. Covid-19 intensive care unit staff were relatively protected (0.44 [0.28–0.69]), likely by a bundle of PPE-related measures. Positive results were more likely in Black (1.66 [1.25–2.21]) and Asian (1.51 [1.28–1.77]) staff, independent of role or working location, and in porters and cleaners (2.06 [1.34–3.15]).

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