A systematic critical review on MRI in spondyloarthritis

Table 6 Associations between MRI finding in the SIJ and the diagnosis of AS and IBP

MRI findings	Sensitivity of MRI findings (95% CI)	Specificity of MRI findings (95% CI)	Cases, number		Controls, number
			AS	IBP	NLSBP	No LBP
BMO	0.85 (0.76-0.92)	0.93 (0.84-0.97)	75			59
Erosions	0.91 (0.82-0.95)	0.98 (0.91-1.00)	75			59
Fat infiltration	0.91 (0.82-0.95)	0.86 (0.76-0.93)	75			59
Ankylosis	0.27 (0.18-0.38)	1.00 (0.94-1.00)	75			59
Global assessment	0.99	0.96	75			59
BMO	0.85 (0.76-0.92)	0.77 (0.58-0.89)	75		26
Erosions	0.91 (0.82-0.95)	0.96 (0.81-0.99)	75		26
Fat infiltration	0.91 (0.82-0.95)	0.85 (0.67-0.94)	75		26
Ankylosis	0.26 (0.18-0.38)	1.00 (0.87-1.00)	75		26
Global assessment	0.99	0.92	75		26
BMO	0.67 (0.48-0.81)	0.93 (0.84-0.97)		27		59
Erosions	0.48 (0.31-0.66)	0.98 (0.91-1.00)		27		59
Fat infiltration	0.37 (0.22-0.56)	0.86 (0.76-0.93)		27		59
Global assessment	0.52	0.96		27		59
BMO	0.67 (0.48-0.81)	0.77 (0.58-0.89)		27	26
Erosions	0.48 (0.31-0.66)	0.96 (0.81-0.99)		27	26
Fat infiltration	0.37 (0.22-0.56)	0.85 (0.67-0.94)		27	26
Global assessment	0.52	0.92		27	26

Results from Weber et al. (2010). Sensitivity and specificity based on concordant observations of a minimum of two of five readers. 95% CI calculated from raw data. MRI, magnetic resonance imaging; SIJ, sacroiliac joint; AS, ankylosing spondylitis; IBP, inflammatory back pain; CI, confidence interval; NSLBP, nonspecific low-back pain; BMO, bone marrow edema; global assessments, 95% CI not possible to calculate, because of no raw data.

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