Using a panel of eight biomarkers (PIIANP, TIMP-1, ADAMTS-4, CCL2, IP-10 and TGF-β3), this model distinguishes between OA, knee injury and inflammatory knee arthritis (i.e. RA or psoriatic arthritis) with almost 100% efficacy (289). This evidence concerns the gene CXCL10 and psoriatic arthritis.