HLA-DQA2 and rheumatoid arthritis: In addition, a previous study (30) of HLA types and the self-reported fields for rheumatoid arthritis in the UK Biobank has shown an association between DQA1*03:01 and the disease (OR 1.77, CI 1.70–1.85, p = 1.5*10–131, moderate linkage disequilibrium with HLA-DRB1*04:01 r2 = .5).