Table 3.

Pairwise Pearson correlation coefficients of erosion imaging methods at baseline (t0), at 2-year followup (t1), and for progression over 2 years. MRI methods were read on 2 independent occasions. All sets include 32 subjects unless otherwise indicated.

	Computer-assisted Volume t0		RAMRIS t0
	First Read	Second Read	First Read	Second Read
RAMRIS t0	0.86	0.47
Radiograph t0, n = 28	0.74	0.71	0.73	0.30
	Computer-assisted volume t1		RAMRIS t1
RAMRIS t1	0.90	0.68
Radiograph t1, n = 28	0.59	0.56	0.63	0.28
	Computer assisted volume progression		RAMRIS progression
RAMRIS progression	0.81	0.33
Radiograph progression, n = 28	0.30	0.31	0.57	0.52

RAMRIS: Rheumatoid Arthritis Magnetic Resonance Imaging Score.