Probability of EFS dated from start of treatment in AML, RAEB-t, and RAEB groups. Log rank P value = .047 for comparison of RAEB versus RAEB-t + AML. There have been 289 events in the AML group (n = 372), 81 in the RAEB-t group (n = 106), and 45 in the RAEB group (n = 52). Median follow-up for patients alive in CR = 2.3 years.