Table 2

Association between MRI inflammation and axial pain sites in the DESIR cohort (multivariate analysis)

	Inflammatory lesions by MRI
	Thoracic (n=122)		Lumbar (n=137)		Sacroiliac (n=295)
	OR (95% CI)*	p Value	OR (95% CI)*	p Value	OR (95% CI)*	p Value
Thoracic pain	1.71 (1.09–2.67)	0.02	1.15 (0.76–1.73)	0.5	0.85 (0.60–1.20)	0.37
Lumbar pain	1.06 (0.50–2.22)	0.87	2.53 (1.03–6.20)	0.04	1.00 (0.54–1.82)	0.99
Buttock pain	1.23 (0.73–2.07)	0.43	1.00 (0.62–1.63)	0.99	2.86 (1.84–4.46)	0.0001
Gender (male)	3.0 (1.91–4.72)	0.0001	1.97 (1.30–2.98)	0.001	2.0 (1.41–2.83)	0.0001
Age (+1 SD)	1.34 (1.07–1.67)	0.008	1.40 (1.14–1.72)	0.01	0.82 (0.69–0.98)	0.03
HLA-B27	2.47 (1.54–3.98)	0.0001	1.54 (1.01–2.36)	0.04	2.14 (1.51–3.03)	0.0001
LnCRP (+1SD)	1.34 (1.05–1.71)	0.01	1.21 (0.98–1.51)	0.07	1.16 (0.98–1.38)	0.09

CI, confidence interval; CRP, C-reactive protein.
Normal MRIs were defined as MRIs scored 0 and abnormal MRIs as MRIs scored 1 or 2.
*ORs estimated using logistic regression models.