ICAM1 and rheumatoid arthritis: For example, MMP1 in RA was significantly correlating with MMP3, MMP9, Insulin, c-Peptide, CRP, SAA and s-ICAM-1, while in PsA it only correlated with MMP9, s-ICAM-1 and s-VCAM-1, with a trending correlation with Glucagon.