MMP3 and rheumatoid arthritis: In total RA, MMP-3 was positively correlated with ESR (r = 0.336, p < 0.001), CRP (r = 0.400, p < 0.001) and VEGF (r = 0.319, p < 0.001), and negatively correlated with the lymphocyte percentage (r = −0.328, p < 0.001) (Supplementary Figures S2A, C).