Abstr #1494 determinants of clinically important worsening (CIW) of early axSpA - CIW = ASDAS ↑ > 0.9 b/w 2 visits - Tender Joint count and ASAS-NSAID score associated w/ CIW - MRI SI Jt inflammation & structural damage predictive of CIW @RheumNow #ACR22 https://t.co/Dgeh25BaWM