There was a small increase in the minor (A) allele frequency in patients with GCA (OR 1.15, 95% CI 0.76 to 1.72), but this did not reach statistical significance (p=0.51) The meta-analysis of rs2476601 minor allele frequencies from all available GCA case–control studies is reported in figure 1 .
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PTPN22 R620W minor allele is a genetic risk factor for giant cell arteritis.
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