The rate of progression of nr-axSpA to AS is ~10% every 2 years. Study of 79 patients over 6 years, radiographic progression was 10.1% after 2 years (8/79), 8.3% between 2-4 years (4/48), and 12.5% between 4-6 years (3/24) @RheumNow #ACR21 Abst#0907 https://t.co/hOhpngANIl https://t.co/PiKDgiTES2