Landmark analysis of survival according to CgR and treatment arm.

The calculation includes only patients who were alive and in CP after 1 year of treatment. Patients are divided into (1) those who during the first year of treatment had achieved a MCgR (complete or partial) (66% to 100% Ph⁻) (upper curves, no difference between IFN-α plus LDAC and IFN-α) (P = .33, log rank test) and (2) those who during the same period had not achieved a MCgR (66% or lower Ph⁻, or Ph⁻ not available) (lower curves, no difference between IFN-α plus LDAC and IFN-α) (P = .15, log rank test).