Incidence and prevalence of axial spondyloarthritis: methodologic challenges and gaps in the literature.

Abstract

There is an unmet need for future studies to use consistent methodology, capture all relevant information (including HLA-B27 positivity), and investigate under-reported populations (e.g. nr-axSpA; southern hemisphere countries) to estimate the population burden of axSpA. Future studies should aim to address data gaps to provide accurate incidence/prevalence estimates for the global axSpA population.