Abstract：
Health care workers (HCWs) are particularly exposed to COVID-19 and therefore it is important to study preventive measures in this population.
To investigate socio-demographic factors and professional practice associated with the risk of COVID-19 among HCWs in health establishments in Normandy, France.
A cross-sectional and 3 case-control studies using bootstrap methods were conducted in order to explore the possible risk factors that lead to SARS-CoV2 transmission within HCWs. Case-control studies focused on risk factors associated with (a) care of COVID-19 patients, (b) care of non COVID-19 patients and (c) contacts between colleagues.
2,058 respondents, respectively 1,363 (66.2%) and 695 (33.8%) in medical and medico-social establishments, including HCW with and without contact with patients.
301 participants (14.6%) reported having been infected by SARS-CoV2. When caring for COVID-19 patients, HCWs who declared wearing respirators, either for all patient care (ORa 0.39; 95% CI: 0.29-0.51) or only when exposed to aerosol-generating procedures (ORa 0.56; 95% CI: 0.43-0.70), had a lower risk of infection compared with HCWs who declared wearing mainly surgical masks. During care of non COVID-19 patients, wearing mainly a respirator was associated with a higher risk of infection (ORa 1.84; 95% CI: 1.06-3.37). An increased risk was also found for HCWs who changed uniform in workplace changing rooms (ORa 1.93; 95% CI: 1.63-2.29).
Correct use of PPE adapted to the situation and risk level is essential in protecting HCWs against infection.
To investigate socio-demographic factors and professional practice associated with the risk of COVID-19 among HCWs in health establishments in Normandy, France.
A cross-sectional and 3 case-control studies using bootstrap methods were conducted in order to explore the possible risk factors that lead to SARS-CoV2 transmission within HCWs. Case-control studies focused on risk factors associated with (a) care of COVID-19 patients, (b) care of non COVID-19 patients and (c) contacts between colleagues.
2,058 respondents, respectively 1,363 (66.2%) and 695 (33.8%) in medical and medico-social establishments, including HCW with and without contact with patients.
301 participants (14.6%) reported having been infected by SARS-CoV2. When caring for COVID-19 patients, HCWs who declared wearing respirators, either for all patient care (ORa 0.39; 95% CI: 0.29-0.51) or only when exposed to aerosol-generating procedures (ORa 0.56; 95% CI: 0.43-0.70), had a lower risk of infection compared with HCWs who declared wearing mainly surgical masks. During care of non COVID-19 patients, wearing mainly a respirator was associated with a higher risk of infection (ORa 1.84; 95% CI: 1.06-3.37). An increased risk was also found for HCWs who changed uniform in workplace changing rooms (ORa 1.93; 95% CI: 1.63-2.29).
Correct use of PPE adapted to the situation and risk level is essential in protecting HCWs against infection.
摘要：
卫生保健工作者（HCWs）特别暴露于COVID-19，因此研究该人群的预防措施非常重要。
为了调查诺曼底卫生机构中与COVID-19风险相关的社会人口统计学因素和专业实践，法国。
为了探索导致SARS-CoV2在HCW内传播的可能危险因素，进行了使用Bootstrap方法的横断面和3个病例对照研究。病例对照研究侧重于与(A)COVID-19患者护理相关的危险因素，（b）对非COVID-19患者的护理和（c）同事之间的接触。
2,058名受访者，医疗和医疗社会机构分别为1363家(66.2%)和695家(33.8%)，包括与患者接触和不接触的HCW。
301名参与者（14.6%）报告感染了SARS-CoV2。在照顾COVID-19患者时，声明佩戴呼吸器的医护人员，对于所有患者护理（ORa0.39;95%CI：0.29-0.51）或仅在暴露于气溶胶生成程序时（ORa0.56;95%CI：0.43-0.70），与宣布主要佩戴外科口罩的医护人员相比，感染风险较低。在非COVID-19患者的护理期间，主要佩戴呼吸器与较高的感染风险相关(ORa1.84;95%CI:1.06-3.37).在工作场所更衣室更换制服的医护人员的风险也增加（ORa1.93；95％CI：1.63-2.29）。
正确使用适应情况和风险水平的PPE对于保护HCWs免受感染至关重要。
为了调查诺曼底卫生机构中与COVID-19风险相关的社会人口统计学因素和专业实践，法国。
为了探索导致SARS-CoV2在HCW内传播的可能危险因素，进行了使用Bootstrap方法的横断面和3个病例对照研究。病例对照研究侧重于与(A)COVID-19患者护理相关的危险因素，（b）对非COVID-19患者的护理和（c）同事之间的接触。
2,058名受访者，医疗和医疗社会机构分别为1363家(66.2%)和695家(33.8%)，包括与患者接触和不接触的HCW。
301名参与者（14.6%）报告感染了SARS-CoV2。在照顾COVID-19患者时，声明佩戴呼吸器的医护人员，对于所有患者护理（ORa0.39;95%CI：0.29-0.51）或仅在暴露于气溶胶生成程序时（ORa0.56;95%CI：0.43-0.70），与宣布主要佩戴外科口罩的医护人员相比，感染风险较低。在非COVID-19患者的护理期间，主要佩戴呼吸器与较高的感染风险相关(ORa1.84;95%CI:1.06-3.37).在工作场所更衣室更换制服的医护人员的风险也增加（ORa1.93；95％CI：1.63-2.29）。
正确使用适应情况和风险水平的PPE对于保护HCWs免受感染至关重要。
