Table 4.

Logistic regression assessing the risk of MRI sacroiliitis and including rs1004819 genotype, age, gender, HLA-B27 presence and NSAIDs intake

	OR [95%CI]	p value
rs1004819	0.71 [0.53–0.94]	0.02
age	–	NS
Gender	2.15 [1.46–3.19]	< 0.0001
CRP (per mg/L)	1.02 [1.00–1.03]	0.01
ASDAS-CRP	–	NS
HLA-B27	1.95 [1.27–2.97]	0.002
NSAIDs intake	–	NS

Age, ASDAS-CRP and NSAIDs intake were removed after backward procedure

OR odds ratio, %95CI 95% confidence interval, NS non-significant