<scp>Long‐Term</scp> Association Between Disease Activity and Disability in Early Axial Spondyloarthritis: Results From a Prospective Observational Study of Inflammatory Back Pain

Abstract

Disease activity contributes longitudinally to disability and is hierarchically superior to any other variable in explaining this health domain. Enthesitis and spinal mobility are also key drivers of disability in early axial SpA. ASDAS-CRP cutoffs that separated different patient disability profiles largely mimicked the cutoffs previously defined for ASDAS-CRP disease activity states.