Overall survival according to risk classifications.

(A) MRC classification (Table 4): using the MRC cytogenetic classification, there was a significant difference in overall survival between the 3 subgroups of patients (P < .001 by the log-rank test). No significant difference was, however, observed between the favorable and intermediate subgroups (P = .19 by the log-rank test). (B) Current classification (Table 4): using the current classification, there was a significant difference in overall survival between the 3 subgroups of patients (P < .001 by the log-rank test). Here, a significant difference was observed between the favorable and intermediate groups (P = .007 by the log-rank test). The 11 patients allografted in CR1 were censored at transplantation time.