617 seropos ARTHRALGIA pts - 34% got inflamm. arthritis (avg time ~20mos). Arthritis risk factors: high ACPA (HR 4.7) or double positive(HR 6.8); 1st degree relative (1.5); intermittent Sxs(1.6); <12 mos Sxs (HR 0.71); AM stiff ≥1hr (1.6); joint swelling (1.5). IF > 2 https://t.co/tHL19ro5C8