This secondary analysis confirmed several known associations such as the associations of JIA with HLA-A02, HLA-B27, HLA-DRB1*01, HLA-DRB1*08, and HLA-DQB1*04 [62,63,64,65,66,67,68,69,70,71,72,73,74,75]. This evidence concerns the gene HLA-DRB1 and juvenile idiopathic arthritis.