Table 4. Univariate and multivariate logistic regression analyses for factors associated with the presence of IR in RA patients.

	Univariate			Multivariate
	OR	95% CI	p	OR	95% CI	p
Age (year)	1.1	1.013-1.193	0.023	1.096	1.011-1.187	0.026
Sex	0.577	0.137-2.431	0.453	1.617	0.389-6.73	0.509
Menopausal status	0.552	0.013-23.739	0.757
Body mass index	1.286	0.98-1.688	0.07	1.258	0.969-1.633	0.085
Disease duration (weeks)	1.07	0.765-1.497	0.693
DAS28 score	6.003	1.638-22.005	0.007	5.75	1.754-18.844	0.004
RF (IU/mL)	1.001	0.999-1.002	0.505
Anti-CCP (RU/mL)	0.999	0.998-1.001	0.396	0.999	0.998-1.001	0.475
C-reactive protein	1.047	1.018-1.076	0.001	1.047	1.018-1.076	0.001
Erythrocyte sedimentation rate	0.983	0.954-1.013	0.265	0.981	0.953-1.011	0.213
Using NSAIDs	1.911	0.219-16.651	0.558
IR: Insulin resistance; RA: Rheumatoid arthritis; CI: Confidence interval; DAS28: 28-joint disease activity score; RF: Rheumatoid factor; Anti-CCP: Anti-cyclic citrullinated peptide; NSAIDs, nonsteroidal anti-inflammatory drugs; Menopausal status is for female group. A p value <0.05 is considered as statistically significant.