Qual Life Res (2017) 26:2507–2517 DOI 10.1007/s11136-017-1601-x Screening for depression in arthritis populations: an assessment of differential item functioning in three self-reported questionnaires 1 1 Jinxiang Hu Michael M. Ward Accepted: 23 May 2017 / Published online: 17 June 2017 Springer International Publishing Switzerland 2017 Abstract DIF accounted for 8% or less of the arthritis-depression Purpose To determine if persons with arthritis differ sys- association, and excluding items with DIF did not reduce tematically from persons without arthritis in how they the difference in depression scores between those with and respond to questions on three depression questionnaires, without arthritis. which include somatic items such as fatigue and sleep Conclusions Persons with arthritis respond to items on the disturbance. CES-D, PHQ-9, and K-6 depression scales similarly to Methods We extracted data on the Centers for Epidemio- persons without arthritis, despite the inclusion of somatic logical Studies Depression (CES-D) scale, the Patient items in these scales. Health Questionnaire-9 (PHQ-9), and the Kessler-6 (K-6) scale from three large population-based national surveys. Keywords Differential item functioning MIMIC We assessed items on these questionnaires for differential Depression Arthritis item functioning (DIF) between persons with and without self-reported physician-diagnosed arthritis using multiple indicator
Quality of Life Research – Springer Journals
Published: Jun 17, 2017
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