"Background: The interrelationship between the sense of coherence, work environment, work engagement, and psychological distress have particular interest in non-health workers who carried out essential activities during the COVID-19 pandemic. Objective: To assess the effects of the COVID-19 on the physical and mental health of non-health workers. Design: Observational descriptive cross-sectional study. Data sources: 1089 questionnaires have been analysed. Engagement (UWES-9), sense of coherence (SOC-13), mental health (Goldberg GHQ-12), demographic data, perception of health and stress and work environment were assessed. Results: At low levels of engagement, the percentage of distress is higher (77.9%). Low levels of sense of coherence correspond to the highest percentages of distress (86.3%). The 94.1% believe it necessary for professionals and volunteers involved in COVID-19 to receive psychological support. Low comprehensibility is mediated by the perception of stress; if the perception is low, comprehensibility is modulated by the level of significance; if it is low, it generates 95.9% of distress. Conclusion: The interrelationship between the sense of coherence, work environment, work engagement, and psychological distress have particular interest in non-health workers who carried out essential activities during the COVID-19 pandemic. Almost all respondents believed that professionals and volunteers involved in COVID-19 should receive psychological support. This may be an indicator of the effect of the COVID-19 pandemic on workers' mental health. "

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