Interaction between BCR-ABL1-like and IKZF1 status for predicting relapse. CIR with death as a competing event for cases with or without a deletion in IKZF1 among BCR-ABL1-like and non–BCR-ABL1-like ALL cases. The box below the graphs indicates the 5-year CIR, and P values compared with the reference group of non–BCR-ABL1-like and IKZF1 wild-type cases (black line). BCR-ABL1–positive and MLL-rearranged cases were excluded from this analysis.