Event-free Survival in Patients With Induction Failure Versus Patients Who Achieved Complete Remission. Event-free survival (EFS) in 120 patients with induction failure on the basis of new criteria (M2 and M3 marrow and/or end of induction minimal residual disease ? 5%) compared with those patients who achieved complete remission at the end of induction. Data indicate eight-year EFS estimates. Numbers within each group are indicated in the at-risk table beneath the graph. O/E, observed/expected. Reprinted with permission. © 2017 American Society of Clinical Oncology. All rights reserved.