Characteristics associated with SARS-CoV-2 testing, infection and vaccine uptake among essential non-healthcare workers in Montréal, 2021.

Chelsea Caya, Dick Menzies, Jesse Papenburg, Cedric Yansouni, Jonathon Campbell
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Abstract

Background: Essential non-healthcare workers experienced higher rates of SARS-CoV-2 infection compared to non-essential workers.

Objective: Identify characteristics associated with SARS-CoV-2 testing, infection and vaccine uptake among essential non-healthcare workers in Montréal, Québec.

Methods: Secondary, cross-sectional analysis of data collected from participants prospectively recruited in two observational studies (first study, Onsite Testing Study, January-March 2021; second study, Self-Testing Study, July-October 2021) of essential non-healthcare workers in 2021. Logistic regression with generalized linear mixed models was used to explore characteristics associated with our outcomes (previous SARS-CoV-2 testing, exposure and vaccination).

Results: Overall, 2,755 participants were included (first study, Onsite Testing Study, n=2,128; and second study, Self-Testing Study, n=627). A higher proportion of participants identified as male (n=1,601; 58%), non-White (n=1,527; 55%) and worked in the manufacturing/supplier sector (n=1,706; 62%). Relative to the first study, Onsite Testing Study, participants in the second study, Self-Testing Study, had higher odds (78% vs. 46%; aOR 4.1, 95% CI: 3.2-5.2) of previous SARS-CoV-2 testing and of testing positive prior to study enrolment (6.2% vs. 4.3%; aOR 1.7, 95% CI: 1.1-2.6). Individuals reporting recent SARS-CoV-2 exposure had higher odds of previous SARS-CoV-2 testing (aOR 4.0, 95% CI: 3.0-5.4), while older age (aOR 0.98, 95% CI: 0.98-0.99 per one-year increase) and being male (aOR 0.6, 95% CI: 0.5-0.7) were associated with lower odds of previous testing. Results were similar in stratified analyses. Participants from businesses with more than 50 employees had higher odds of having received a SARS-CoV-2 vaccine (91% vs. 80%; aOR 2.6, 95% CI: 1.4-4.8).

Conclusion: Consideration of individual and business characteristics associated with testing and vaccination programs for SARS-CoV-2 could improve equity, uptake and impact.

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2021 年蒙特利尔基本非医疗保健工作者中与 SARS-CoV-2 检测、感染和疫苗接种相关的特征。
背景与非基本工作者相比,基本非医疗工作者的 SARS-CoV-2 感染率更高:确定魁北克省蒙特利尔市基本非医疗保健工作者中与 SARS-CoV-2 检测、感染和疫苗接种相关的特征:对 2021 年两项观察性研究(第一项研究,现场检测研究,2021 年 1 月至 3 月;第二项研究,自我检测研究,2021 年 7 月至 10 月)中前瞻性招募的基本非医疗保健工作者参与者的数据进行二次横断面分析。采用广义线性混合模型进行逻辑回归,以探究与我们的结果(既往的 SARS-CoV-2 检测、接触和疫苗接种)相关的特征:共有 2,755 人参与了研究(第一项研究,现场检测研究,n=2,128;第二项研究,自我检测研究,n=627)。男性(n=1,601;58%)、非白人(n=1,527;55%)和在制造/供应商部门工作(n=1,706;62%)的参与者比例较高。与第一项研究(现场检测研究)相比,第二项研究(自我检测研究)的参与者曾接受过 SARS-CoV-2 检测和在加入研究前检测呈阳性的几率更高(78% 对 46%;aOR 4.1,95% CI:3.2-5.2)(6.2% 对 4.3%;aOR 1.7,95% CI:1.1-2.6)。报告最近接触过 SARS-CoV-2 的人以前接受过 SARS-CoV-2 检测的几率较高(aOR 4.0,95% CI:3.0-5.4),而年龄较大(aOR 0.98,95% CI:0.98-0.99,每增加一年)和男性(aOR 0.6,95% CI:0.5-0.7)与以前接受过检测的几率较低有关。分层分析的结果类似。来自员工人数超过 50 人的企业的参与者接种过 SARS-CoV-2 疫苗的几率更高(91% 对 80%;aOR 2.6,95% CI:1.4-4.8):结论:考虑与 SARS-CoV-2 检测和疫苗接种计划相关的个人和企业特征可提高公平性、疫苗接种率和影响力。
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