Major depression is a common and treatable mental disorder characterized by changes in mood, and cognitive and physical symptoms over a 2-week period (1). It is associated with high societal costs (2) and greater functional impairment than many other chronic diseases, including diabetes and arthritis (3). Depression rates differ by age, sex, income, and health behaviors (4). This report provides the most recent national estimates of depression among adults. Prevalence of depression is based on scores from the Patient Health Questionnaire (PHQ-9), a symptom-screening questionnaire that allows for criteria-based diagnoses of depressive disorders (5). Estimates for non-Hispanic Asian persons are presented for the first time.
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