Event-free survival and survival for the patient cohort.

(A) Event-free survival for patients randomized toE coli–asparaginase (solid line) orErwinia-asparaginase (broken line). O indicates observed number of events (remission failure, relapse, or death in CR); N, total number of patients randomized. (B) Survival for patients randomized toE coli–asparaginase (solid line) orErwinia-asparaginase (broken line). O indicates observed number of deaths; N, total number of patients randomized.