Cumulative incidence of relapse and aGVHD by MICA group. (A) Cumulative incidence of relapse with death as competing risk, by MICA group. Cumulative incidence curves for MICA match and mismatch groups are not statistically different for relapse (35% vs 20%, P = .21) or for the competing risk of death (29% vs 35%, P = .4). (B) Cumulative incidence of acute GVHD with death as competing risk, by MICA group. Cumulative incidence curves for MICA match and mismatch groups are statistically different for acute GVHD (40% vs 80%, P < .001), but they are not significantly different for the competing risk of death (6% vs 0%, P = .15).