Arthritis Care & Research · 2008 · 39 citations · 26 references
The C-HAQ showed moderate responsiveness to clinical change, construct validity, good feasibility, internal consistency, and discriminative ability. These findings demonstrate that the C-HAQ represents a good measure to capture disability in patients with active juvenile SLE.
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The Measurement of Observer Agreement for Categorical Data
J. Richard Landis, Gary G. Koch · Biometrics · 1977 · 76.3K citations · Full text
Coefficient Alpha and the Internal Structure of Tests
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The 1982 revised criteria for the classification of systemic lupus erythematosus
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Diagnosis, Pathology, Dermatology +19
Measurement of patient outcome in arthritis
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