Psychometric evaluation of the persian version of Existential Concern Questionnaire (ECQ) in Iranian general population: a cross-sectional study.

Background: Existential anxiety is the anxiety that goes beyond objective threats and is related to a person's existence. Due to the lack of appropriate instrument to measure all five domains of existential anxiety in the Iranian population, this study aimed to examine the psychometric properties of the Existential Concern Questionnaire (ECQ) in the Iranian general population.

Methods: This online cross-sectional survey was conducted from October 9 to December 11, 2023 in Tehran, Iran.