Table 1.

Spearman correlation coefficients between MRI combined scores and clinical, radiographic (CR), and ultrasound variables, all cohorts.

Scores	DAS28	TJC28	SJC28	PtGA	PGA	CRP	ESR^*	PFTS^*^£	USPD^*	USBM^*
Inflammation scores
1. Unweighted summation	0.32	0.14	0.42	0.12	0.32	0.40	0.24	−0.26	0.49	0.54
2. Normalized summation	0.36	0.18	0.46	0.14	0.35	0.43	0.24	−0.25	0.52	0.55
3. Weighted summation	0.27	0.13	0.38	0.11	0.29	0.33	0.17	−0.29	0.47	0.52
4. Adjusted-weighted summation	0.30	0.15	0.42	0.11	0.31	0.37	0.19	−0.28	0.50	0.54
5. Single site–weighted summation	0.29	0.14	0.36	0.11	0.29	0.32	0.21	−0.26	0.46	0.48
Damage scores	CR Erosions		CR JSN		CR Total
1. Unweighted summation	0.43		0.33		0.40
2. Normalized summation	0.41		0.32		0.38
3. Weighted summation	0.43		0.34		0.40
4. Adjusted-weighted summation	0.43		0.33		0.40
5. Single site–weighted summation	0.42		0.37		0.43

↵* ARCTIC trial only.
↵£ Negative correlation because of inverse scale of PROMIS T score. All coefficients significant at the 0.05 level. CR: conventional radiography [CR scored by modified Sharp/van der Heijde score (hands, wrists, and feet)]; CRP: C-reactive protein (mg/l); DAS28: 28-joint count Disease Activity Score (range 0–10); ESR: erythrocyte sedimentation rate; MRI: magnetic resonance imaging; PtGA/PGA: patient’s/physician’s global assessment visual analog scale (range 0–100); PFTS: PROMIS T score; PROMIS: Patient Reported Outcomes Measurement Information System; SJC: swollen joint count in 28 joints; TJC: tender joint count in 28 joints; USPD/USBM: ultrasound power-Doppler/B-mode.