This paper is in the following e-collection/theme issue:

Psychiatry (41) JMH Theme Issue: COVID-19 and Mental Health: Impact and Interventions (374) Infectious Diseases (non-STD/STI) (1490)

Published on in Vol 13 (2024)

Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/50064, first published .
Factors Associated With Worsened Mental Health of Health Care Workers in Canada During the COVID-19 Pandemic: Cross-Sectional Survey Study

Factors Associated With Worsened Mental Health of Health Care Workers in Canada During the COVID-19 Pandemic: Cross-Sectional Survey Study

Factors Associated With Worsened Mental Health of Health Care Workers in Canada During the COVID-19 Pandemic: Cross-Sectional Survey Study

Authors of this article:

Ali AbdulHussein1 Author Orcid Image ;   Zahid Ahmad Butt2 Author Orcid Image ;   Stanko Dimitrov1 Author Orcid Image ;   Brian Cozzarin1 Author Orcid Image
Article Authors Cited by Tweetations (3) Metrics

    Original Paper

    1Department of Management Science, Faculty of Engineering, University of Waterloo, Waterloo, ON, Canada

    2School of Public Health Sciences, Faculty of Health, University of Waterloo, Waterloo, ON, Canada

    Corresponding Author:

    Ali AbdulHussein, BEng, MEng, MBA

    Department of Management Science

    Faculty of Engineering

    University of Waterloo

    200 University Ave W

    Waterloo, ON, N2L 3G1

    Canada

    Phone: 1 (519) 888 4567

    Fax:1 (519) 888 4567

    Email: a9abdulh@uwaterloo.ca


    Background: Health care workers (HCWs) in Canada have endured difficult conditions during the COVID-19 pandemic. Many worked long hours while attending to patients in a contagious environment. This introduced an additional burden that may have contributed to worsened mental health conditions.

    Objective: In this study, we examine the factors associated with worsened mental health conditions of HCWs as compared to before the start of the pandemic.

    Methods: We use data from a survey of HCWs by Statistics Canada. A regression model is used to estimate the odds ratios (ORs) of worsened mental health after the start of the pandemic. The estimated odds ratio (OR) is associated with different independent variables that include demographics (age, sex, immigration status, and geographic area), occupational factors (work status, occupational group, and exposure category), and different access levels to personal protective equipment (PPE).

    Results: Of 18,139 eligible participants surveyed, 13,990 (77.1%) provided valid responses. We found that HCWs younger than 35 years old were more likely (OR 1.14, 95% CI 1.03-1.27; P=.01) to exhibit worsened mental health as compared to the reference group (35-44 years old). As for sex, male HCWs were less likely (OR 0.76, 95% CI 0.67-0.86; P<.001) to exhibit worsened mental health as compared to female HCWs. Immigrant HCWs were also less likely (OR 0.57, 95% CI 0.51-0.64; P<.001) to exhibit worsened mental health as compared to nonimmigrant HCWs. Further, HCWs working in Alberta had the highest likelihood of exhibiting worsened mental health as compared to HCWs working elsewhere (Atlantic provinces, Quebec, Manitoba, Saskatchewan, Ontario, British Columbia, and Northern Territories). Frontline workers were more likely (OR 1.26, 95% CI 1.16-1.38; P<.001) to exhibit worsened mental health than nonfrontline HCWs. Part-time HCWs were less likely (OR 0.85, 95% CI 0.76-0.93; P<.001) to exhibit worsened mental health than full-time HCWs. HCWs who reported encountering COVID-19 cases were more likely (OR 1.55, 95% CI 1.41-1.70; P<.001) to exhibit worsened mental health as compared to HCWs who reported no contact with the disease. As for PPE, HCWs who never had access to respirators, eye protection, and face shields are more likely to exhibit worsened mental health by 1.31 (95% CI 1.07-1.62; P<.001), 1.51 (95% CI 1.17-1.96; P<.001), and 1.41 (95% CI 1.05-1.92; P=.02) than those who always had access to the same PPE, respectively.

    Conclusions: Different HCW groups experienced the pandemic differently based on their demographic and occupational backgrounds as well as access to PPE. Such findings are important to stakeholders involved in the planning of personalized support programs and aid mental health mitigation in future crises. Certain groups require more attention.

    Interact J Med Res 2024;13:e50064

    doi:10.2196/50064

    Keywords

    health care workers; COVID-19; mental health; demographic factors; occupational factors; access to PPE; pandemic; health care system; psychological trauma; psychological; trauma; respirators; eye protection; face shields; support 


    On March 11, 2020, the World Health Organization declared COVID-19 a global pandemic. The pandemic resulted in devastating health impacts on populations and a crisis within the health care system [1]. This health care system was tasked to handle the unprecedented inflow of patients. Functions within the system that were impacted include emergency departments, intensive care units, physician services, and long-term care units [2]. Health care workers (HCWs) of different occupational groups battled the pandemic. Overwhelmed hospitals in Canada canceled less urgent surgeries by up to 80% by June 2020 [3]. These patterns shifted the workload on HCWs and had an impact on the overall health care system. These conditions not only demanded more hospital capacity but also put an overwhelming strain on HCWs [4]. In addition to the operational pressure, HCWs also suffered from the lack of personal protection equipment (PPE), especially at the beginning of the pandemic [5]. HCWs were at the frontline in battling this pandemic. This battle has put pressure on their mental health conditions [6-8].

    In this paper, we assess the various factors associated with worsened HCWs’ mental health conditions as compared to before the start of the pandemic. Although experiencing mental health conditions may be a daily occurrence for some HCWs, the duration and severity during the pandemic were different. HCWs were also at a higher risk of infection, adding to the risk of further mental health conditions [9]. In the past, HCWs have experienced mental health problems during other outbreaks, including the Middle East respiratory syndrome and the severe acute respiratory syndrome [10]. Such conditions have been studied in the literature [11]. In this study, we use a recent data set by Statistics Canada from a national cross-sectional survey that was conducted in the fall of 2020 to assess the impact of COVID-19 on HCWs. Unlike work in the literature, we comprehensively assess the impact of demographic and occupational factors as well as the availability of PPE on HCWs’ mental health conditions [9,12,13].

    In the global literature, authors assessed the mental health conditions of HCWs during such outbreaks globally [14-16]. The impact of demographic, social, and occupational factors was reportedly linked to various mental health conditions. Researchers also assessed the prevalence of stress, anxiety, and other psychological well-being indicators of HCWs in Oman during the pandemic [12]. The focus was on young female HCWs who encountered confirmed or suspected COVID-19 cases during their work. Another study in Turkey examined the relationship between the perceived risk of infection and the mental health conditions of HCWs during the COVID-19 pandemic [13]. In addition, a study in the Chinese province of Hubei was conducted early in the pandemic to assess the psychological impact of the pandemic on the frontline medical staff [9]. The study measured the association of factors including professional group, age, and sex factors with work stress.

    Our study is among the first to highlight the association of diverse demographic and occupational factors with the mental health condition of HCWs during the pandemic in Canada. We also considered the role of access to PPE on HCWs’ mental health conditions. Unlike existing literature, we studied the individual impact of each of the following factors on the mental health of HCWs while holding the rest constant. Demographic factors include age group, sex, province of the workplace, and immigration status. Occupational factors include work status, frontline category, and exposure to confirmed or suspected COVID-19 cases. Finally, we also considered access to several PPE. The findings of the study will be of prime importance to key stakeholders, including mental health support program planners, health care policy makers, HCWs themselves, and researchers in the area. The goal of this paper is to understand which factors were associated with worsened mental health conditions in HCWs after the start of the pandemic.


    Data Sources, Study Procedure, and Participants

    We used a data set from a recent cross-sectional survey by Statistics Canada on the impacts of COVID-19 on HCWs. Unlike other traditional Statistics Canada surveys, a random selection of participants was not used. Instead, Statistics Canada sent an email invitation to HCWs across Canada. Then, a snowball sampling procedure was used. The invitation included a link to a web-based survey that was available through Statistics Canada’s web page. Accordingly, 18,139 responses were collected between November 24 and December 13, 2020, across 7 provincial and territorial regions in Canada. No data were collected for this survey beyond these dates. Only responses by HCWs were included in the data set. The responses were completely anonymized by Statistics Canada.

    The questionnaire asked HCWs for information related to the job environment, demographics, geography, and information on access to PPE as background information. Adaptive questioning was used. Our study was limited to these 3 factors categories only: demographics, occupational, and access to PPE based on the available data from Statistics Canada. In assessing mental health well-being, the survey asked HCWs: compared to before the COVID-19 pandemic, how would you say your mental health is now? HCWs self-reported their perceived mental health on a 5-point Likert scale: much better now, somewhat better now, about the same, somewhat worse now, much worse now.

    Statistical Analysis Strategy

    Our study uniquely studied the association of various interesting factors, as depicted in Figure 1, with HCW mental health conditions as compared to before the start of the pandemic. To consider each factor separately, we used a multivariate ordinal logistic regression [17,18]. The model is defined in Multimedia Appendix 1. The dependent variable is the state of mental health of the respondents. We reduced the mental health state categories from the 5 mentioned above to 3 (improved, same, or worsened) to yield statistically significant model estimates. The independent variables include demographics such as age, sex, immigration status, and the province of the workplace. Occupational variables include work status, occupational group, and exposure to COVID-19 cases. The model also estimated the association of HCWs’ access to a variety of PPE, such as respirators, eye protection, and face shields. Access to PPE is also reported by the HCW on a 5-point Likert scale, which we reduced to 3 categories (always available, sometimes available, or never available) to yield statistically significant model estimates. All responses are self-reported. Analyses were conducted in RStudio (version 1.4.1717; Posit, PBC).

    ‎
    Figure 1. Factors associated with the mental health of HCWs. HCW: health care worker; PPE: personal protective equipment.

    Ethical Considerations

    Data collected by Statistics Canada were reviewed based on the following principles: privacy, security, transparency, accountability, trust, sustainability, data quality, and fairness, as well as well vetted to be harmless to participants or the public. All ethical approvals were considered by Statistics Canada. No further ethical approval to use these data was required by the authors and the survey is made available to the public. This study is exempt from further ethical approval. Furthermore, the authors also did not have access to information related to the development and testing of the survey. The authors are also not aware of any compensation provided to survey participants.


    Participant Profile

    From the full data set of 18,139 responses, we considered nonduplicate responses that provided valid answers to all questions of interest to this study (N=13,990). The remaining responses contained missing or invalid responses. For the considered population, Table 1 outlines the number of observations and percentages for different demographic factors such as age group, sex, and immigration status. The number of observations and percentages were also calculated for occupational factors including the province of the primary workplace, work status (full-time vs part-time), frontline work status, occupational group, and exposure to confirmed or suspected COVID-19 cases. Additionally, the last 3 rows of Table 1 outline PPE access levels for 3 different PPE: face shields, eye protection, and respirators. Overall 4261 (31%) HCWs were younger than 35 years. The majority were female participants (n=12,682, 91%). In total, 12,510 (89%) HCWs were nonimmigrant. HCW workers were distributed across 7 regions, with the largest group of 6626 (47%) working in Ontario. The majority (n=10,152, 73%) of HCWs worked full-time and 5511 (39%) were nonfrontline allied health professionals. A total of 8188 (59%) HCWs did not report exposures to confirmed or suspected COVID-19 cases. As for access to PPE, 10,758 (77%) HCWs always had access to face shields, 10,118 (72%) always had access to eye protection, and 6898 (49%) always had access to respirators.

    Table 1. Participant demographic, occupational, and PPEa access characteristics.
    CharacteristicsValue, n (%)
    Age (years)

    		<354261 (30.5)

    		35-443962 (28.3)

    		45-543415 (24.4)

    		≥552352 (16.8)
    Sex

    		Male1308 (9.3)

    		Female12,682 (90.7)
    Immigration status

    		Nonimmigrant12,510 (89.4)

    		Immigrant1480 (10.6)
    Province of workplace

    		Atlantic provinces1972 (14.1)

    		Quebec832 (5.9)

    		Ontario6626 (47.4)

    		Manitoba and Saskatchewan1308 (9.3)

    		Alberta2018 (14.4)

    		British Columbia1194 (8.5)

    		Northern territories40 (0.3)
    Work status

    		Full-time10,152 (72.6)

    		Part-time3838 (27.4)
    Frontline occupation

    		Physician397 (2.8)

    		Nurse4689 (33.5)

    		Emergency medical personnel223 (1.6)
    Nonfrontline occupation

    		Personal support worker454 (3.2)

    		Allied health professional5511 (39.4)

    		Laboratory worker1267 (9.1)

    		Pharmacist169 (1.2)

    		Dental professional1280 (9.1)
    Exposure toconfirmed or suspected cases

    		Yes5802 (41.5)

    		No8188 (58.5)
    Access to PPE

    		Face shields


    		Always or usually available10,758 (76.9)


    		Sometimes available1070 (7.6)


    		Never available357 (2.6)


    		Skipped answer1805 (12.9)

    		Eye protection


    		Always or usually available10,118 (72.3)


    		Sometimes available1132 (8.1)


    		Never available556 (4.0)


    		Skipped answer2184 (15.6)

    		Respirators


    		Always or usually available6898 (49.3)


    		Sometimes available1369 (9.8)


    		Never available676 (4.8)


    		Skipped answer 5047 (36.1)

    aPPE: personal protective equipment.

    Analysis Results

    In the following, we present the results for estimating the associations between the various factors and the likelihood of worsened mental health conditions for HCWs.

    Demographic Factors

    Model estimates are expressed as odds ratios (ORs), as presented in Table 2. These ORs indicate the odds of worsened mental health conditions as compared to before the start of the pandemic. Based on the ORs in Table 2, HCWs who are younger than 35 years old were more likely (OR 1.14, 95% CI 1.03-1.27; P=.01) to exhibit worsened mental health conditions than the reference group (35 to 44 years old). Furthermore, those aged 45-54 years and 55 years and older were less likely to exhibit worsened mental health conditions than the reference group (OR 0.71, 95% CI 0.64-0.78; P<.001; and OR 0.55, 95% CI 0.49-0.61; P<.001, respectively). Hence, the older the HCW, the lower the likelihood of worsened mental health conditions. As for sex, male HCWs were less likely (OR 0.76, 95% CI 0.67-0.86; P<.001) to exhibit worsened mental health conditions than their female counterparts. Immigrant HCWs were also less likely (OR 0.57, 95% CI 0.51-0.64; P<.001) to exhibit worsened mental health conditions than nonimmigrants. Geographically, HCWs working in Alberta have the highest likelihood of worsened mental health conditions. HCWs living in Alberta were most likely to exhibit worsened mental health conditions.

    Table 2. Estimates for the ordinal regression model for various factors associated with the mental health conditions of HCWsa.
    Independent variablesβSEORb (95% CI)P value
    Age group (years; reference: 35 to 44 years)
    Less than 350.130.051.14 (1.03-1.27).01
    45-54–0.350.050.71 (0.64-0.78)<.001
    55 and older–0.600.060.55 (0.49-0.61)<.001
    Sex (reference: female)
    Male–0.280.060.76 (0.67-0.86)<.001
    Immigration status (reference: nonimmigrant)
    Immigrant–0.560.060.57 (0.51-0.64)<.001
    Work location (reference: Alberta)
    Atlantic provinces–0.410.070.66 (0.57-0.77)<.001
    Quebec–0.300.090.74 (0.61-0.89)<.001
    Manitoba and Saskatchewan–0.090.080.91 (0.77-1.08).27
    Ontario–0.240.060.78 (0.70-0.88)<.001
    British Columbia–0.090.090.92 (0.77-1.09).31
    North Territories–0.560.340.57 (0.30-1.15).01
    Work status (reference: full-time)
    Part-time–0.160.040.85 (0.76-0.93)<.001
    Job setting (reference: nonfrontline)
    Frontline0.230.051.26 (1.16-1.38)<.001
    Contact with patients with COVID-19 (reference: no contact)
    Exposure0.440.051.55 (1.41-1.70)<.001
    Access to respirators (reference: did not need)
    Always–0.030.050.97 (0.88-1.07).13
    Sometimes0.300.081.34 (1.14-1.59)<.001
    Never0.270.101.31 (1.07-1.62)<.001
    Access to eye protection (reference: did not need)
    Always–0.030.060.97 (0.85-1.10).17
    Sometimes0.290.111.33 (1.08-1.65)<.001
    Never0.410.131.51 (1.17-1.96)<.001
    Access to face protection (reference: did not need)
    Always0.260.071.30 (1.14-1.48)<.001
    Sometimes0.400.111.50 (1.21-1.86)<.001
    Never0.350.151.41 (1.05-1.92).02

    aHCW: health care worker.

    bOR: odds ratio.

    Occupational Factors

    Frontline HCWs, such as physicians, nurses, and emergency medical personnel, were more likely (OR 1.26, 95% CI 1.16-1.38; P<.001) to exhibit worsened mental health conditions than nonfrontline workers (personal support workers, allied health professionals, laboratory workers, pharmacists, and professionals). Part-time HCWs, however, were less likely (OR 0.85, 95% CI 0.76-0.93; P<.001) to exhibit worsened mental health conditions. Furthermore, HCWs who reported encountering suspected or confirmed COVID-19 cases were more likely (OR 1.55, 95% CI 1.41-1.70; P<.001) to exhibit worsened mental health conditions.

    Access to PPE

    HCWs who never had access to PPE such as respirators, eye protection, and face shields exhibited the highest likelihood of worsened mental health conditions than those who always had access to such PPE. For instance, HCWs who never had access to respirators were more likely (OR 1.31, 95% CI 1.07-1.62; P<.001) to exhibit worsened mental health conditions than those who did not need this PPE. Similar trends were exhibited with access to eye protection (OR 1.51, 95% CI 1.17-1.96; P<.001) and face shields (OR 1.41, 95% CI 1.05-1.92; P=.02).


    Principal Findings

    The statistical analysis in this study found that HCWs who are younger than 35 years old were found to be more likely to exhibit worsened mental health conditions than HCWs aged 35-44 years. Male HCWs were less likely to exhibit worsened mental health conditions than female HCWs. Immigrant HCWs were also less likely to exhibit worsened mental health conditions than nonimmigrant HCWs. In contrast, HCWs working in Alberta had a higher likelihood of worsened mental health conditions than HCWs working elsewhere (Atlantic provinces, Quebec, Manitoba, Saskatchewan, Ontario, British Columbia, and Northern Territories). Frontline workers were more likely to exhibit worsened mental health conditions than nonfrontline HCWs. Part-time HCWs were less likely to exhibit worsened mental health conditions than full-time HCWs. HCWs who reported encountering COVID-19 cases were more likely to exhibit worsened mental health conditions than HCWs who reported no contact with the disease. As for PPE, HCWs who never had access to respirators, eye protection, and face shields were more likely to exhibit worsened mental health conditions than those who always had access to the same PPE, respectively.

    Comparison With Prior Work

    Previous research has shown that shock events can result in psychological trauma to HCWs [19-21]. To the best of our knowledge, our study is the first to assess the association of a comprehensive variety of factors (demographics, occupational factors, and access to PPE) independently with the mental health conditions of HCWs.

    With regard to demographic factors, a study found sex to be associated with worsened mental health conditions of HCWs. Female medical staff exhibited a higher incidence of severe anxiety than their male counterparts [22]. Sex was also found as a predictor of increased anxiety and distress in a study that found female HCWs more vulnerable to such conditions than male HCWs [23]. Our study findings corroborate these previous findings. Similarly, for age, our results demonstrated that older HCWs exhibited less likelihood of worsened mental health conditions. This agrees with findings from a study in the Middle East that found older workers enjoyed better mental health conditions than younger workers [24]. Older HCWs with longer work experience seemed to have handled the pandemic better than their younger counterparts. Another study found that HCWs 40 years or older were less likely to report higher anxiety during the pandemic than younger HCWs [25]. Our results confirm such findings as well.

    As for occupational factors, our findings align with a cross-sectional study conducted in Oman, which found frontline workers to be more likely to have anxiety and sleep problems [26]. This was attributed to frontline workers’ increased awareness of the mortality rate of COVID-19 and their fear of contracting the virus. Similar findings were reported by a study conducted in China as well [27]. Exposure to COVID-19 cases has been recognized as a risk factor associated with an increased likelihood of mental health issues in the literature. For instance, in France, female urologists working on the frontline were 1.41 times more likely to feel a degree of stress during their duties. Of this group, those who worked in a department where patients with COVID-19 are treated were 1.85 times more likely to report a degree of stress during work duties [28]. This was attributed to the workers’ fear of infection and the spread of the virus. Direct involvement with COVID-19 care is also found to be highly associated with fear, depression, and anxiety as compared with those working under lower risk conditions [29]. The authors attributed this to the workers’ fear of bringing the virus to their families at home.

    As for the work setting, contrary to our findings, the literature reports higher levels of fear and anxiety among part-time HCWs than among full-time [30]. Another study in France found part-time HCWs to exhibit a greater association with distress [31]. Given the small number of part-time HCWs in our study, caution should be observed in interpreting the results. Regarding factors related to access to PPE, access to PPE was found to be associated with better health and less stress [24]. Lack of access to PPE was found to be a major source of HCW stress in a study that surveyed emergency physicians [32]. In Canada, a study found that inadequate PPE supply is associated with increased symptoms of anxiety and depression among HCWs [33]. Workers were concerned about the ability to access sufficient PPE during work hours. These findings are in line with our results. Compared to studies in the literature, our study is the first comprehensive study that assesses the association of a diverse pool of factors including demographics, occupational, and access to PPE, with HCWs’ mental health conditions.

    Implications: Mental Health Programming

    Our comprehensive study sheds light on the association of various factors with HCWs’ mental health after the start of the pandemic. It helps in understanding the vulnerability of various HCW groups to mental health during such events. Certain groups were at substantially higher risk of exhibiting worsened mental health conditions after the pandemic, hence the need for a specialized support program to target this group. As a direct implication, the findings can be used to inform guidelines for mental health support for HCWs during future public health emergencies. Such mental health support may be directed more specifically to more vulnerable groups. Literature has pointed to the importance of an evidence-based approach to designing mental health support programs for HCWs [34,35]. For instance, a study in Alberta during the pandemic pointed to the importance of understanding HCWs’ occupational settings and mental health mitigation techniques [16]. Others have discussed the importance of support programs for HCWs during the pandemic based on need and background [36,37]. More importantly, many studies highlighted the importance of designing personalized mental health support programs based on various factors including demographic and occupational factors [38,39]. Some of these programs used mobile technology to offer mental health support to HCWs [35,40]. As such, our study aims to inform stakeholders of such factors associated with HCW groups most vulnerable to future events such as the pandemic and health crises.

    Limitations and Future Directions

    This study has several limitations. First, the scope of the study was limited to assessing mental health in general without measuring different mental condition forms such as depression, anxiety, and fear. This is due to the limited data offered by the survey we used. Second, participants were asked, “Compared to before the COVID-19 pandemic, how would you say your mental health is now?” That is, HCWs had to objectively compare their mental health state from the time they received the survey to sometime in the past. There may be some variation in how HCWs perceive this comparison. Third, data collected were at a single point in time, which limits the ability to compare mental health assessments to later periods in the pandemic and during subsequent pandemic waves. Fourth, no information about HCW medical history is collected in this survey. In future research, we recommend collecting data at different points in the given event to allow for a time-series analysis and comparison at different crucial points of the event. We also suggest the collection of distress information and whether the conditions persisted beyond the initial shockwave. HCWs’ years of work experience and ethnicity information can also be useful in future studies. We also believe medical history, particularly a preexisting history of mental health disorders, is an important factor associated with the mental health conditions of HCWs and should be considered in future studies.

    Conclusions

    This study investigated the factors associated with worsened mental health conditions of HCWs in Canada during the pandemic. Our study suggested the association of various factors with the likelihood of HCWs exhibiting worsened mental health conditions as compared to feeling neutral and better. In agreement with the literature, our findings concluded that younger (vs older), female (vs male), nonimmigrant (vs immigrant), full-time (vs part-time), and frontline (vs nonfrontline) HCWs living in Alberta (vs other provinces) exhibited a higher likelihood of worsened mental health conditions than those who felt neutral or better. Those who reported concerns about access to PPE also exhibited the same trend. Such findings can guide the future development of health care programming and inform mental health support planning for HCWs. COVID-19 is a shocking event that introduced uncertainty to the health care system.

    Acknowledgments

    We would like to thank Statistics Canada for providing the data used in this study.

    Data Availability

    The data that support the findings of this study is available through Statistics Canada.

    Authors' Contributions

    AA processed and cleaned the data and wrote the first draft of the manuscript with guidance from ZAB. BC and SD conducted iterative reviews and suggested revisions to the draft. All authors offered substantial contributions to the discussion and analysis presented in this manuscript. All authors agreed to publish the final draft of this paper.

    Conflicts of Interest

    None declared.

    Multimedia Appendix 1

    Logistic model.

    DOCX File , 21 KB
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    ‎
    HCW: health care worker
    OR: odds ratio
    PPE: personal protective equipment

    Edited by T de Azevedo Cardoso; submitted 18.06.23; peer-reviewed by S Alwan; comments to author 08.11.23; revised version received 26.11.23; accepted 12.01.24; published 15.02.24

    Copyright

    ©Ali AbdulHussein, Zahid Ahmad Butt, Stanko Dimitrov, Brian Cozzarin. Originally published in the Interactive Journal of Medical Research (https://www.i-jmr.org/), 15.02.2024.

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