Refractory disease p OR 95.0% C.I. Lower Upper Age (years) 0.644 1.008 0.976 1.041 Marrow blasts (%) 0.349 0.992 0.975 1.009 Immunophenotype Pre Referent 1 - Common 0.015 2.326 1.431 7.956 Pro 0.220 1.945 0.672 5.629 BCR-ABL (positive vs negative) 0.264 0.643 0.296 1.395 BAALC (high vs low) 0.003 3.133 1.482 6.623

Table 3: Multivariate analysis for predicting chemotherapy resistance in all studied cases.