Sullivan MB, Iannaccone C, Cui J, Lu B, Batra K, Weinblatt M, Shadick NA. Evaluation of selected rheumatoid arthritis activity scores for office-based assessment. J Rheumatol 2010;37:2466-8. In the abstract under Results, “CDAI (r = 0.74, Δr = 0.64)” should read “CDAI (r = 0.84, Δr = 0.80)”; and “RAPID (r = 0.62, Δr = 0.57)” should read “RAPID (r = 0.71, Δr = 0.70)”. We regret the error.