Validity and Agreement between the 28-Joint Disease Activity Score Based on C-Reactive Protein and Erythrocyte Sedimentation Rate in Patients with Rheumatoid Arthritis

Table 2

Cross-classification of patients at low, moderate, or high disease activity when using DAS28-ESR versus DAS28-CRP.

Baseline		DAS28-ESR
		Low disease activity (%)	Moderate disease activity (%)	High disease activity (%)
DAS28-CRP	Low disease activity (%)	5 (6.7)	2 (2.7)	0 (0)
	Moderate disease (%) activity	1 (1.3)	14 (18.7)	12 (16)
	High disease activity (%)	0 (0)	1 (1.3)	40 (53.3)
One year follow-up		DAS28-ESR
		Low disease activity (%)	Moderate disease activity (%)	High disease activity (%)
DAS28-CRP	Low disease activity (%)	36 (48)	10 (13.3)	0 (0)
	Moderate disease activity (%)	0 (0)	24 (32)	3 (4)
	High disease activity (%)	0 (0)	0 (0)	2 (2.7)

, patients with ESR and CPR measures available at baseline and at the follow-up visit one year later.