Psychometric and factorial validity of the International Adjustment Disorder Questionnaire (IADQ) in an Italian sample: a validation and prevalence estimate study.

IADQ is an easy-to-use, brief, and psychometrically sound self-report measure for AjD. Thus, it may be considered a reliable tool for both research and clinical settings. To the best of our knowledge, our study reported for the first time the prevalence of AjD during COVID-19 pandemic.