Cumulative incidence of relapse at the cytogenetic or hematologic level after SCT for CML according to results of an early RT-PCR test.

Relapse is defined only on cytogenetic or hematologic criteria, and patients whose disease did not progress beyond molecular relapse are classified as “nonrelapsed” patients. The P value shown has been pooled over strata. The pairwise over strata Pvalues are negative versus low positive, P = .01; negative versus high positive, P < .0001; and low positive versus high positive, P = .001.