Table 3.

Correlation table (R²) for disease activity outcomes in RA patients

	SJC	TJC	PD score	GS score	Erosions score	ESR	CRP	VAS
DAS-28	0.38*	0.59	0.29	0.18	0.21	0.61	0.20	0.70
SJC	1.0	0.18	0.61	0.58	0.37	0.24	0.12	0.10
TJC		1.0	0.05	0.03	0.15	0.29	0.06	0.50*
PD score			1.0	0.71	0.08	0.11	0.09	0.15
GS score				1.0	0.11	0.41*	0.05	0.01
Erosions					1.0	0.16	0.02	0.01
ESR						1.0	0.02	0.27
CRP							1.0	0.003
VAS

CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; DAS-28, disease activity score assessing 28 joints; GS, grey scale; PD, power Doppler; SJC, swollen joint count; TJC, tender joint count

*Denotes p value < 0.005