Kaplan-Meier curves for EFS (A) and overall survival (OS) (B) for 372 patients with good-, poor-, and intermediate-risk abnormalities. Good risk: abnormalities of 7p; poor risk: normal karyotype, –7, t(9;11), 9p abnormalities other than t(9;11), –13, 13q–, or –15; and intermediate risk: patients not included in good or poor-risk group. A patient with both 7p abnormalities and –15 was included in the good-risk group.