Validation of the Patient Health Questionnaire-4 (PHQ-4) to screen for depression and anxiety in the Greek general population

Abstract

The Patient Health Questionnaire-4 (PHQ-4) is an ultra-brief self-report screening scale for depression and anxiety with promising psychometric properties; however, its reliability and validity have not been investigated in Greece yet. The objective of the current study was to investigate the reliability and validity of the PHQ-4 and to establish a cut-off score to identify depression and anxiety in the Greek general population.