On the other hand, PDGFB levels were higher in the urine of patients with OAPS than in those with TAPS (p=0.0406), APL carriers (p=0.0207), patients with miscarriages (p<0.0001), patients with thrombosis (p<0.0001), patients with RA (p=0.0002), patients with SLE (p=0.0052), and HCs (p=0.0005). Here, PDGFB is linked to systemic lupus erythematosus.