The present study was designed to determine whether the protein tyrosine phosphatase non-receptor 22 () C1858T variant is associated with susceptibility to vasculitis. A meta-analysis was conducted to evaluate the association between the C1858T variant and vasculitis. A trial sequential analysis was performed to evaluate the robustness of the meta-analysis. A total of 17 studies were included in this meta-analysis which revealed a highly significant association between the T allele and vasculitis of multiple types (odds ratio [OR] = 4.850, 95% confidence interval [CI] = 3.043-7.729, < 0.001). Meta-analysis by vasculitis type showed an association between the T allele and risk of giant cell arteritis (GCA) and antineutrophil cytoplasmic antibody-associated vasculitis (AAV) (OR = 7.505, 95% CI = 3.605-15.62, < 0.001; OR = 6.121, 95% CI = 3.216-11.65, < 0.001). The meta-analysis also indicated an association between the T allele and Takayasu's arteritis, but not between the T allele and Behcet's disease or Henoch-Schönlein purpura. TSA indicated that the observed association is conclusive with the existing evidence. This meta-analysis confirms that the C1858T variant is associated with susceptibility to GCA and AAV.
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