Structural Validity of the Rheumatology Attitudes Index in Systemic Sclerosis: Analysis from the UCLA Scleroderma Quality of Life Study.

Gholizadeh, Shadi; Mills, Sarah D; Fox, Rina S; Merz, Erin L; Roesch, Scott C; Clements, Philip J; Kafaja, Suzanne; Furst, Daniel E et al. · J Rheumatol · 2017

cross_sectional · Level IV

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Abstract

To evaluate the structural validity of the Rheumatology Attitudes Index (RAI), a widely used measure of rheumatic disease-related helplessness in patients with systemic sclerosis (SSc). Patients with physician-confirmed SSc from the University of California, Los Angeles (UCLA) Scleroderma Quality of Life Study (n = 208) received clinical examinations and completed self-report questionnaires. The structural validity of the RAI was examined through confirmatory and exploratory factor analysis (CFA/EFA). A tenable factor structure was not identified through CFA or EFA. The present structural analysis did not support the use of the RAI with SSc patients.

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