Patient Health Questionnaire-9 (PHQ-9)

The Patient Health Questionnaire-9 (PHQ-9) is a simple, widely used tool for assessing depression. It consists of nine questions that ask about feelings and experiences related to mood, interest in activities, sleep, energy levels, and more, over the past two weeks. Each question is scored, helping healthcare providers determine the severity of depression. The results guide treatment decisions and monitor progress. PHQ-9 is valuable in both clinical settings and research for understanding and managing mental health.