Relationship between the immunophenotypic clustering of patients according the antigenic profile of their CD45^hi/SS^hi BM cells, FAB categories, IPSS score, cytogenetic risk factor, and blast cell counts on BM smears.

(A) Distribution of the FAB categories; (B) mean of the IPSS score; (C) mean of the cytogenetic risk factor; and (D) mean of the blast cell count on BM smears in each of the 8 clusters defined in Figure 2A.P values are indicated for each panel (χ² test for panel A; variance analysis for panels B-D).