Differential Item Functioning on the Patient Health Questionnaire-8 by Disease Subtype, Language, Sex, and Age among People with Systemic Sclerosis: A Scleroderma Patient-centered Intervention Network Cohort Study
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Objective: Somatic items used in depression assessments can potentially overlap with symptoms related to physical illness, including systemic sclerosis (SSc). No studies have looked at whether somatic depression items may be infl... ...