Canadian lupus cohort of 560 SLE pts without myositis at baseline. Over time, only 5 pts developed myositis (after mean 8.5 yrs). Incidence = 1.05 per 1000 PYs. Arthritis, Raynauds, -Sm Abs were common, but only non-Whites had increased risk of myositis. https://t.co/fzWhUADjMz