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Reliability and validity of the CSSRD functional assessment survey in rheumatoid arthritis. Cooperative Systematic
Objective:
To demonstrate the reliability and validity characteristics of a fast, intensively focused functional assessment questionnaire that has been used in rheumatoid arthritis clinical trials by the Cooperative Systematic Studies of Rheumatic Diseases group (CSSRD).
Methods:
Data from three double-blind, controlled clinical trials by CSSRD were used to examine the properties of the Functional Assessment Survey as a measure of physiologic function.
Results:
The Functional Assessment Survey has reasonable test-retest reliability and convergent validity with the Steinbrocker et al. functional class. It demonstrated appropriate divergent validity with other clinical measures of response, as well as discriminant validity.
Conclusions:
The CSSRD Functional Assessment Survey is brief, intensive, and focused. Reliability and validity characteristics have been documented.
