How many and quickly does nr-AxSpA progress to r-AxSpA? Poddubnyy et al for the PROOF study showed that 16% of nr-AxSpA pts progressed to r-AxSpA within 5 years, mean time to radiographic progression was 2.4 years #EULAR2022 @RheumNow OP0149 https://t.co/KTC8Xkt4ey