Association of grade II-IV aGVHD with mismatches of HLA-DPB1 and rs6937034. Cumulative incidence of grade II-IV aGVHD. HRs and P values were calculated by competing-risk regression analysis, in which death before aGHVD was considered a competing risk. Association was tested according to the mismatch for the single SNP (rs6937034) (left), whereas HLA-DPB1 mismatch (middle) in the GVH direction was used to draw Kaplan-Meier curves. This trend in association was not obvious in increased numbers of HLA-DPB1 mismatches (right). HR, hazard ratio.