Table 1. Agreement of different field strengths, scored according to RAMRIS in arthralgia-patients.

	Median	Median	ICC	ICC	ICC
	score	score	3.0T-1.5T	3.0T-1.5T	3.0T-1.5T
	1.5T	3.0T	Reader 1	Reader 2	Mean of the two readers
	(IQR; max)	(IQR; max)	(95% CI)	(95% CI)	(95% CI)
RAMRIS	5 (2-8; 35)	7 (4-9; 31)	0.81(0.62-0.91)	0.92(0.82-0.96)	0.90(0.78-0.95)
Inflammation	3 (2-4; 29)	4 (3-6; 25)	0.79 (0.60-0.90)	0.93 (0.83-0.97)	0.90 (0.78-0.95)
Erosions	2 (1-4; 7)	3 (2-4; 8)	0.78 (0.56-0.89)	0.77 (0.56-0.89)	0.81 (0.63-0.91)
Osteitis	1 (0-2;11)	1 (0-1; 11)	0.81 (0.63-0.91)	0.89 (0.71-0.95)	0.96 (0.91-0.98)
Synovitis	1 (0-3; 10)	3 (1-4; 8)	0.59 (0.26-0.79)	0.76 (0.28-0.90)	0.65 (0.24-0.84)
Tenosynovitis	0 (0-1; 8)	0 (0-1; 7)	0.66 (0.39-0.82)	0.81 (0.63-0.91)	0.87 (0.74-0.94)

Median of the mean score of the two readers are given in the first column. ICCs are based on single measure in a two-way mixed effect model. RAMRIS is the summed score on erosions, osteitis, synovitis and tenosynovitis. Inflammation is the summed score on osteitis, synovitis and tenosynovitis.

Abbreviations: ICC= intraclass correlation coefficient (ICC); IQR interquartile range; max= maximum; CI=confidence interval