FCGR3B and temporal arteritis: There was no evidence that the overall distribution of FCGR3B CNV genotypes differed significantly between GCA patients and controls (global χ2 = 0.75, df = 2, P = 0.69) nor was there any evidence of a specific difference between GCA patient and controls for low (<2, P = 0.85) or high (3+, P = 0.39) FCGR3B copy number (Table 2).