| Summary: | Objectives: How individuals perceive the risk of COVID-19 influences their mental health and protective behaviors. Therefore, the development of an instrument to capture COVID-19-related worries and fears is relevant. This study aims to develop and validate the CoV-WoFe to measure COVID-19-related worries and fears.Methods: An online questionnaire was completed by 593 participants during Christmas 2020 and by 328 participants during Summer 2021, from which 88 participants formed a longitudinal sample.Results: Analyses confirmed a robust adjustment for consistency over time and a gender-invariant bifactorial structure. Factor 1 represented worry about the health consequences of COVID-19 and Factor 2 represented the perceived physiological symptoms associated with fear of COVID-19. Construct validity was evidenced by: the expected relations between the CoV-WoFe and other theoretically related constructs; the serial mediating role of both dimensions in the relationship that security values establish with protective behaviors against COVID-19 and with anxiety; and the expected gender differences in the Cov-WoFe.Conclusion: The CoV-WoFe represents a short, valid, reliable, gender-invariant tool that is easy to apply in both the health professional and research context to assessCOVID-19-related worries and fears, which are variables of relevance for spread of the virus and for mental health.
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