Table 6.

Correlation between 7-joint ultrasound score and different parameters in RA

		US7 score
		Synovitis GS	Synovitis PD	Tenosynovitis GS	Tenosynovitis PD	US erosions	Total US scores
Disease duration	r s	-0.150	-0.089	0.101	0.007	0.535 *	0.145
	P	0.529	0.709	0.671	0.976	0.015 *	0.542
DAS28	r s	0.024	-0.265	0.175	-0.239	-0.077	-0.059
	P	0.922	0.259	0.534	0.309	0.747	0.805
HAQ score	r s	-0.210	0.005	0.057	-0.013	0.334	0.077
	P	0.373	0.982	0.812	0.955	0.151	0.746
PGA	r s	-0.349	-0.111	0.208	0.321	-0.082	-0.172
	P	0.132	0.640	0.379	0.168	0.731	0.469
Pain –VAS	r s	-0.349	-0.111	0.208	0.321	-0.082	-0.172
	P	0.132	0.640	0.379	0.168	0.731	0.469
ESR 1st hr	r s	0.015	-0.090	-0.087	0.136	-0.336	-0.024
	P	0.951	0.707	0.717	0.569	0.147	0.919
CRP	r s	-0.241	-0.065	-0.369	-0.306	-0.093	-0.206
	P	0.305	0.784	0.110	0.189	0.695	0.385
RF	r s	0.176	0.365	0.525 *	0.346	0.377	0.443
	P	0.459	0.114	0.017 *	0.135	0.101	0.051
ACPA	r s	0.459 *	0.627 *	0.675 *	0.554 *	0.402	0.666 *
	P	0.042 *	0.003 *	0.001 *	0.011 *	0.079	0.001 *
Serum OPN	r s	0.323	-0.003	-0.092	0.169	0.179	0.342
	P	0.165	0.991	0.699	0.475	0.450	0.141
Serum OPG	r s	0.512 *	0.323	0.160	0.136	0.138	0.509 *
	P	0.021 *	0.165	0.500	0.569	0.562	0.022 *

rs: Spearman coefficient, *: Statistically significant at p ≤ 0.05

US7: 7-joint ultrasound score; GS: Grayscale; PD: power Doppler; DAS: disease activity score; HAQ: health assessment questionnaire; PGA: Patient global assessment; VAS: Visual Analogue Scale; ESR: erythrocyte sedimentation rate; CRP: c-reactive protein; RF: rheumatoid factor; ACPA: anti-citrullinated protein antibodies; OPN: Osteopontin; OPG: Osteoprotegerin