What are the sensitivity and specificity of the PHQ-2 and the PHQ-9 in screening for depression?
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Validation studies of screening tools for major depression in primary care settings have demonstrated that the PHQ-9 has a sensitivity of 0.77 to 0.81 and the PHQ-2 has a sensitivity of 0.83 to 0.87. Specificity of PHQ-9 ranges from 0.91 to 0.94, while that of PHQ-2 ranges from 0.78 to 0.92. When depression is identified by the PHQ-2, completion of the full PHQ-9 or a clinical interview is recommended. (SOR: A, based on 2 systematic reviews of meta-analyses and other validation studies.)
Evidence Based Practice 14(3): 08.