Biologic experienced ankylosing spondylitis patient show better retention on TNF compared to IL-17 inhibitors. 148 AS pts (F/U 31 mos), IL-17i drug survival trended better but only signif after 3yrs. More D/C w/ higher BASDAI (HR: 1.3) & ^# prior biologics (HR 1.62) https://t.co/5HXGsV4xol