Covariates OS DFS P HR 95% CI for HR P HR 95% CI for HR Age (years) 0.081 0.982 0.961 1.002 0.819 0.996 0.964 1.030 Marrow blasts (%) 0.090 1.010 0.998 1.022 0.189 1.011 0.994 1.029 Immunophenotype                 Pro B ALL Referent 1 - - Referent 1 - - Common B ALL 0.394 1.619 0.535 2.978 <0.001 0.254 0.187 2.872 Pre B ALL 0.558 1.299 0.978 1.096 0.238 1.196 0.869 5.548 BAALC expression (high versus low) 0.039 1.652 1.025 2.663 0.002 1.214 1.013 4.368 BCR-ABL <0.001 2.749 1.124 4.940 0.228 1.745 0.706 4.313

Table 4: Multivariate analysis for DFS and OS as dependent parameters studied with other covariates in all studied cases.