Agreement between disease activity scores in 74 black African patients with RA. Bias, lower and upper limits of agreement are shown.

Table S1: Agreement between disease activity scores in 74 black African patients with RA. Bias, lower and upper limits of agreement are shown.

	Bias (95% CI)	Limits of Agreement
Comparisons		Lower (CI)	Upper (CI)
[A] DAS28-ESR and DAS28-CRP	0.58 (0.45 0.71)	-0.55 (-0.77 -0.32)	1.71 (1.48 1.94)
[B] DAS28-ESR-3 and DAS28-CRP-3	0.61 (0.46 0.75)	-0.62 (-0.87 -0.37)	1.83 (1.58 2.08)
[C] DAS28-ESR and Tamhane, et al DAS28-CRP	-0.02 (-0.13 0.10)	-1.04 (-1.24 -0.83)	0.99 (0.79 1.20)
[D] DAS28-ESR and study-specific DAS28-CRP	0.00 (-0.10 0.10)	-0.88 (-1.06 -0.70)	0.88 (0.70 1.06)

CI: Confidence Interval; DAS: Disease Activity Score; ESR: Erythrocyte Sedimentation Rate; CRP: C-Reactive Protein.