Brief Communications Long-Term Follow-up of Adults with Acute Lymphoblastic Leukemia in First Remission Treated with

• Objective: To determine whether the conclusions of a 1991 study, which showed that adults with acute lymphoblastic leukemia in first remission had similar leukemia-free survival rates when treated with chemo-therapy or HLA-identical sibling bone marrow trans-plantation, remain valid after more than 4 years of additional follow-up. • Design: Retrospective comparison of two cohorts of patients using left-truncated Cox regression to adjust for differences in baseline characteristics and time to treatment. • Setting and Patients: Chemotherapy recipients were 484 consecutive patients with acute lymphoblastic leu-kemia in first remission treated in 44 hospitals in Ger-many that were participating in two consecutive trial