Performance of Disease Activity Indices Used in Axial Spondyloarthritis in Real-World Clinical Settings
Objective Monitoring axial spondyloarthritis (axSpA) disease activity using validated indices (eg, Bath Ankylosing Spondylitis Disease Activity Index [BASDAI], Axial Spondyloarthritis Disease Activity Score [ASDAS]) is widely recommended but rarely followed in practice. The reasons, although varied, may be found in the scarcity of studies comparing the performance of these indices in daily practice. Here, we compare the performance of disease activity indices in clinical practice. Methods This was an observational cross-sectional study involving 330 patients. The BASDAI, ASDAS, Bath Ankylosing Spondylitis Functional Index (BASFI), and Assessment of SpondyloArthritis international Society Health Index (ASAS HI) indices were included. Their correlations, degree of concordance, and discriminating capacity for different levels of disease activity and impact were compared using the appropriate statistics. Results A total of 127 women (38.5%) and 203 men (61.5%) were included, with a mean ag
