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The reported rates of depressive symptoms in patients with SSc are high. The Center for Epidemiologic Studies Depression Scale (CES-D) is the only measure of depressive symptoms validated for SSc patients. The objective of this study was to assess the internal consistency reliability, convergent validity and strength of association with clinical correlates of the 9-item version of the Patient Health Questionnaire depression scale (PHQ-9) compared with the CES-D in SSc.

rheumatology

Comparison of the PHQ-9 and CES-D depression scales in systemic sclerosis: internal consistency reliability, convergent validity and clinical correlates