IFNA1 and chronic myelogenous leukemia, BCR-ABL1 positive: Furthermore, the relevant results revealed that the weighted average TFR rate of the previous interferon group reached 61% (95% CI, 53.0%-70.0%), and the weighted average TFR rate for the interferon-free group was 53% (95% CI, 47.0%-60.0%), suggesting that previous IFN treatment might facilitate TFR in patients with CML after discontinuation of 2G-TKI.