Table 1 Serological variables and MRI findings for the discrimination between early stage RA and non‐RA.

Variables	Odds ratio	Coefficient	SE	p Value	Weighted score
Anti‐CCP antibody and/or IgM RF	7.42	2.00	0.57	0.0005	1
MMP‐3	2.87	1.05	0.72	0.14	0
Symmetric synovitis	4.37	1.47	0.57	0.009	1
Bone marrow oedema and/or bone erosion	5.48	1.70	0.63	0.007	1

Logistic regression analysis identified the presence of anti‐CCP antibody and/or IgM RF, symmetric synovitis on MRI, and bone marrow oedema and/or bone erosion on MRI as significant and independent measures for discrimination between early stage RA and non‐RA. The weighted score was calculated based on the regression coefficient for each variable as described in the text.