A strategy of Day14 bone marrows and early intervention is not superior to a strategy of noDay14 bone marrows and delayed intervention in patients with acute myeloid leukemia

Abstract

We conducted a retrospective study of 364 acute myeloid leukemia patients treated using a Day14 or a noDay14 strategy. Under the Day14 strategy, patients received an interim marrow at 7–10 days following chemotherapy and, in case of residual disease, received immediate reinduction chemotherapy. Under the noDay14 strategy patients were only evaluated at end-of-induction (EOI). Overall induction mortality was higher in the Day14 cohort (8.3 vs. 3.6%, p =.12) but rates of remission (75.4 vs. 83%, p =.13) and refractory disease (14.3 vs. 13.4%, p =.87) at EOI were similar in the Day14 and noDay14 cohorts as were relapse rates (37.9% vs. 34.3%, p =.616), median relapse-free survival (14.8 vs. 15 months, p =.658) and median overall survival (25.3 vs. 37.2 months, p =.264). In multivariate analysis, the use of a Day14 strategy did not impact outcomes suggesting that a Day14 strategy is not superior to a noDay14 strategy.