DFS from CR according to donor availability in the 3 age groups. The age groups were 15 to 25 years (A), 26 to 35 years (B), and 36 to 45 years (C). The estimates of the 4-year DFS rates (± SE) for the donor group (dotted line) and the no donor group (solid line) are given. The 4-year cumulative incidences of relapse and of death in CR are given in italics. N indicates number of patients; O, observed number of events (relapse or death in first CR). P was determined by the log-rank test.