how prevalent is AxSpA?

Hi rwald! Thanks for sharing your question with the community. In the US, the prevalence of AxSpA is about .9-1.4%, or roughly 1.7-2.7 million people. Given new diagnostic classification and overlap with AS, it's possible that statistics may be scarce or focus more on AS than other AxSpA spectrum condition. You can read more on AxSpA statistics here. Best, Matt (Team Member, AxialSpondyloarthritis.net)