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Weisman, M.H. et al.

Weisman, Paulus, Russak, Lubeck, Chiou, Sengupta, Ofman, Borenstein, Moadel, Sherbourne, Paulus,

Development of a new instrument for rheumatoid arthritis: the Cedars-Sinai Health-Related Quality of Life instrument (CSHQ- RA).

OBJECTIVE: To update and complement existing instruments, we developed a multidimensional disease-specific instrument, intended to reflect the impact of rheumatoid arthritis ( RA) with modern treatment options on patient's Health-Related Quality of Life (HRQOL). METHODS: Items were developed from a systematic review of published HRQOL measures and transcripts of RA patient focus groups. Items were refined by an expert panel and administered to 350 patients for psychometric testing. RESULTS: The systematic review identified 228 potential items, and the focus group transcripts identified 96 additional items. Expert review and pilot testing resulted in an initial 58-item instrument. Twenty-six items were excluded due to floor/ceiling effects, poor response rates, or high item-item correlations. Factor analysis identified a 5-factor structure (eigenvalues >or=1). Multi-trait scaling performed on both completed surveys confirmed the 5 sub-scale structure (Cronbach's > 0.87). CONCLUSION: The CSHQ- RA consists of 33 items that address 5 HRQOL domains, each with high internal consistency. Additional testing will assess the instrument's validity and responsiveness.[1]

References

Development of a new instrument for rheumatoid arthritis: the Cedars-Sinai Health-Related Quality of Life instrument (CSHQ-RA). Weisman, M.H., Paulus, H.E., Russak, S.M., Lubeck, D.P., Chiou, C.F., Sengupta, N., Ofman, J.J., Borenstein, J., Moadel, A.B., Sherbourne, C.D., Paulus, H.D. Arthritis Rheum. (2003) [Pubmed]

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