Estimates of overall survival. (A) Kaplan-Meier product-limit estimate of overall survival for patients with newly diagnosed acute myeloid leukemia treated on ECOG protocols between 1973 and 1997. Reprinted with permission.⁵  (B) Kaplan-Meier product-limit estimate of overall survival for younger patients (ages ≤ 55 years) with newly diagnosed acute myeloid leukemia treated on ECOG protocols between 1973 and 1997. Reprinted with permission.⁵  (C) Kaplan-Meier product-limit estimate of overall survival for older patients (ages > 55 years) with newly diagnosed acute myeloid leukemia treated on ECOG protocols between 1973 and 1997. From Appelbaum et al.⁵  Copyright American Society of Hematology, used with permission.