Abstract: Objectives: To determine nationally representative estimates of the prevalence of depressive symptoms and factors associated with treatment among those with moderate to severe symptoms.Methods: A cross-sectional, retrospective analysis of adults age?18 in the 2005–2010 NHANES data who responded to the Patient Health Questionnaire (PHQ-9) was conducted (n=13,320). Depressive symptoms and severity were defined by PHQ-9 scores. Depression treatment was defined as receiving either antidepressants or seeing a mental health professional.

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