Open AccessConversion among the 28-joint count activity indices for rheumatoid arthritis
Author(s) -
Khai Pang Leong,
Justina Wei Lynn Tan,
Xiaodan Gao,
Ee Tzun Koh,
TTSH Rheumatoid Arthritis Study Group
Publication year - 2020
Publication title -
european journal of rheumatology :/european journal of rheumatology
Language(s) - English
Resource type - Journals
eISSN - 2147-9720
pISSN - 2148-4279
DOI - 10.5152/eurjrheum.2020.19199
Subject(s) - medicine , erythrocyte sedimentation rate , rheumatoid arthritis , cutoff , quantum mechanics , physics
Disease activity indices for rheumatoid arthritis (RA) are important in clinical practice and research. Although they are closely correlated, they are not in good agreement. We derived formulae to convert values from one of the four 28-joint count indices (disease activity score using erythrocyte sedimentation rate [DAS28-ESR], disease activity score using C-reactive protein [DAS28-CRP], clinical disease activity index [CDAI], and simple disease activity index [SDAI]) to any of the others.