Table 8 shows the final number of alleles by ancestry and by case status. The risk of MS conferred by the European HLA-DRB1*15:01 allele was determined from logistic regression to be three times higher compared to the African HLA-DRB1*15:01 allele (OR = 3.00, 95% CI: 1.90–4.76, p = 2.49 × 10−6), after adjusting for the first 3 MDS components. We restricted the logistic regression to alleles from individuals with one copy of HLA-DRB1*15:01 so that the association was not confounded by number of HLA-DRB1*15:01 alleles. The gene discussed is HLA-DRB1; the disease is myeloid sarcoma.