Anterior chest wall inflammation by whole-body magnetic resonance imaging in patients with spondyloarthritis: lack of association between clinical and imaging findings in a cross-sectional study

Table 4 Agreement between clinical assessments and MRI-detected lesions of the anterior chest wall indicative of inflammation^a

Clinical assessment ^b	MRI-detected lesion ^c	Patient group	κ value [range] ^d
ACW tenderness	BME	SpA	0.06 [0.00 to 0.20]
		AS	0.14 [0.06 to 0.20]
		nrSpA	-0.10 [-0.31 to 0.29]
	Erosion	SpA	-0.03 [-0.11 to 0.01]
		AS	-0.03 [-0.11 to 0.03]
		nrSpA	-0.06 [-0.18 to 0.19]
	Fat infiltration	SpA	0.04 [-0.04 to 0.15]
		AS	0.09 [-0.04 to 0.18]
		nrSpA	-0.20 [-0.23 to 0.15]
ACW pain	BME	SpA	0.21 [0.06 to 0.29]
		AS	0.18 [0.03 to 0.28]
		nrSpA	0.33 [0.17 to 0.44]
	Erosion	SpA	-0.09 [-0.18 to 0.17]
		AS	-0.12 [-0.25 to 0.17]
		nrSpA	0.17 [-0.11 to 0.29]
	Fat infiltration	SpA	0.10 [-0.14 to 0.19]
		AS	0.06 [-0.22 to 0.19]
		nrSpA	0.17 [0.07 to 0.44]

^aACW = anterior chest wall; AS = ankylosing spondylitis; BME = bone marrow edema; MASES = Maastricht Ankylosing Spondylitis Enthesitis Score [16]; nrSpA = nonradiographic spondyloarthritis; SpA = spondyloarthritis. ^bACW tenderness in at least one of four MASES points (physician assessment); ACW pain indicated by patients on a manikin form (patient assessment). ^cMRI-detected lesion recorded in at least one of eight ACW joint locations by each of the seven readers. ^dMedian Cohen's κ values [range] of all seven individual readers.