Reliability and validity of the farsi version of the patient health questionnaire-9 (PHQ-9) with iranian psychiatric outpatients Confiabilidade e validade da versão persa do patient health questionnaire-9 (PHQ-9) em pacientes psiquiátricos ambulatoriais iranianos

Introduction: The Patient Health Questionnaire-9 (PHQ-9) is a brief screening and diagnostic tool for depression. It has been used in research and clinical practice in primary care and other clinical and non-clinical settings. The PHQ-9 has not had its validity examined in psychiatric and psychological settings in Iran. Methods: A cross-sectional study was conducted to investigate the validation of the Farsi version of the PHQ-9. A convenience...