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Table 4 Frequencies of HLA-DQ alleles in patients with ExRA compared with patients with non-extra-articular RA

From: The impact of HLA-DRB1genes on extra-articular disease manifestations in rheumatoid arthritis

HLA-DQ allele Allele frequency P
  ExRA Non-ExRA  
DQ2 0.122 0.121 0.91
DQ3 0.017 0.029 0.50
DQ4 0.046 0.014 0.04
DQ5 0.129 0.188 0.06
DQ6 0.139 0.165 0.37
DQ7 0.252 0.249 1.00
DQ8 0.222 0.170 0.13
DQ9 0.066 0.043 0.22
  1. Global: P = 0.11. ExRA, extra-articular RA.