ROC curve analysis of discrimination of FCM-MRD remission status (FCM positive vs negative) and BFM risk stratification (high vs standard) according to CD11b expression levels at diagnosis. (A) The likelihood for a positive FCM-MRD remission status after induction is given by a CD11b expression at diagnosis of > 515 molecules of equivalent soluble fluorochrome (MESFs; 95% confidence interval, 1.7-15.5). (B) Patients with a CD11b expression > 773 MESFs at diagnosis are more likely Berlin-Frankfurt-Münster high-risk patients (95% confidence interval, 1.8-16.5). AUC indicates area under the curve; and OR, odds ratio.