A systematic critical review on MRI in spondyloarthritis

Table 7 Associations between MRI finding in the spine 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	No LBP
≥ 1 CIL	0.77 (0.61-0.88)	0.77 (0.61-0.88)	35		35
≥ 2 CIL	0.69 (0.52-0.81)	0.94 (0.81-0.98)	35		35
≥ 3 CIL	0.66 (0.49-0.79)	0.94 (0.81-0.98)	35		35
≥ 1 tCIL	0.69 (0.52-0.81)	0.83 (0.67-0.92)	35		35
≥ 2 tCIL	0.57 (0.41-0.72)	0.94 (0.81-0.98)	35		35
≥ 3 tCIL	0.46 (0.30-0.62)	0.97 (0.85-0.99)	35		35
≥ 1 lCIL	0.51 (0.36-0.67)	0.94 (0.81-0.98)	35		35
≥ 1 NIL	0.06 (0.02-0.19)	0.97 (0.85-0.99)	35		35
≥ 1 LIL	0.31 (0.19-0.48)	0.97 (0.85-0.99)	35		35
≥ 1 FIL/PIL	0.09 (0.03-0.22)	1.00 (0.90-1.00)	35		35
≥ 1 CIL	0.40 (0.23-0.59)	0.88 (0.70-0.96)		25	25
≥ 2 CIL	0.32 (0.17-0.52)	0.96 (0.80-0.99)		25	25
≥ 3 CIL	0.12 (0.04-0.30)	0.96 (0.80-0.99)		25	25
≥ 1 tCIL	0.32 (0.17-0.52)	0.88 (0.70-0.96)		25	25
≥ 2 tCIL	0.24 (0.11-0.43)	0.96 (0.80-0.99)		25	25
≥ 3 tCIL	0.12 (0.04-0.30)	0.96 (0.80-0.99)		25	25
≥ 1 lCIL	0.24 (0.11-0.43)	1.00 (0.87-1.00)		25	25
≥ 1 NIL	0.04 (0.01-0.20)	0.96 (0.80-0.99)		25	25
≥ 1 lCIL	0.12 (0.04-0.30)	0.96 (0.80-0.99)		25	25
≥ 1 FIL/PIL	0.00 (0.00-0.13)	1.00 (0.87-1.00)		25	25

Sensitivity and specificity based on concordant observations of three readers; results from Weber et al. (2009). AS, Ankylosing spondylitis; IBP, inflammatory back pain; no LBP, no low-back pain; CIL, vertebral corner inflammatory lesion; tCIL, thoracic CIL; lCIL lumbar CIL; NIL, vertebral noncorner inflammatory lesion; LIL, lateral inflammatory lesion; FIL/PIL, facet or other posterior element inflammatory lesion.

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