Seroprevalence and Risk Factors for Severe Acute Respiratory Syndrome Coronavirus 2 Among Incarcerated Adult Men in Quebec, Canada, 2021

Author:

Kronfli Nadine12ORCID,Dussault Camille1,Maheu-Giroux Mathieu3,Halavrezos Alexandros1,Chalifoux Sylvie1,Sherman Jessica1,Park Hyejin1,Del Balso Lina1,Cheng Matthew P4,Poulin Sébastien5,Cox Joseph123

Affiliation:

1. Centre for Outcomes Research and Evaluation, Research Institute of the McGill University Health Centre , Montréal, Québec , Canada

2. Department of Medicine, Division of Infectious Diseases and Chronic Viral Illness Service, McGill University Health Centre , Montréal, Québec , Canada

3. Department of Epidemiology and Biostatistics, School of Population and Global Health, Faculty of Medicine and Health Sciences, McGill University , Montréal, Québec , Canada

4. Department of Medicine, Divisions of Infectious Diseases and Medical Microbiology, McGill University Health Centre , Montréal, Québec , Canada

5. Centre intégré de santé et de services sociaux des Laurentides , Saint-Jérôme, Québec , Canada

Abstract

Abstract Background People in prison are at increased risk of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. We examined the seroprevalence of SARS-CoV-2 and associated carceral risk factors among incarcerated adult men in Quebec, Canada. Methods We conducted a cross-sectional seroprevalence study in 2021 across 3 provincial prisons, representing 45% of Quebec’s incarcerated male provincial population. The primary outcome was SARS-CoV-2 antibody seropositivity (Roche Elecsys serology test). Participants completed self-administered questionnaires on sociodemographic, clinical, and carceral characteristics. The association of carceral variables with SARS-CoV-2 seropositivity was examined using Poisson regression models with robust standard errors. Crude and adjusted prevalence ratios (aPR) with 95% confidence intervals (95% CIs) were calculated. Results Between 19 January 2021 and 15 September 2021, 246 of 1100 (22%) recruited individuals tested positive across 3 prisons (range, 15%–27%). Seropositivity increased with time spent in prison since March 2020 (aPR, 2.17; 95% CI, 1.53–3.07 for “all” vs “little time”), employment during incarceration (aPR, 1.64; 95% CI, 1.28–2.11 vs not), shared meal consumption during incarceration (“with cellmates”: aPR, 1.46; 95% CI, 1.08–1.97 vs “alone”; “with sector”: aPR, 1.34; 95% CI, 1.03–1.74 vs “alone”), and incarceration post-prison outbreak (aPR, 2.32; 95% CI, 1.69–3.18 vs “pre-outbreak”). Conclusions The seroprevalence of SARS-CoV-2 among incarcerated individuals was high and varied among prisons. Several carceral factors were associated with seropositivity, underscoring the importance of decarceration and occupational safety measures, individual meal consumption, and enhanced infection prevention and control measures including vaccination during incarceration.

Funder

Public Health Agency of Canada

Sero-Surveillance and Research

Publisher

Oxford University Press (OUP)

Subject

Infectious Diseases,Microbiology (medical)

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