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Structural Validity of the Rheumatology Attitudes Index in Systemic Sclerosis: Analysis from the UCLA Scleroderma
Shadi Gholizadeh1,2, Sarah D Mills1,2, Rina S Fox1,2
1From the San Diego State University (SDSU)/University of California (UC) San Diego Joint Doctoral Program in Clinical Psychology, Department of Psychology, San Diego; Department of Psychology, California State University, Dominguez Hills; SDSU, Department of Psychology, San Diego; David Geffen School of Medicine, University of California, Los Angeles (UCLA) School of Medicine, Los Angeles, California; University of Michigan Health System, Ann Arbor, Michigan, USA.
Objective:
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).
Methods:
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).
Results:
A tenable factor structure was not identified through CFA or EFA.
Conclusion:
The present structural analysis did not support the use of the RAI with SSc patients.