Fig. 5.
Kaplan-Meier estimate of event-free survival of patients with a good response to prednisone (PGR) in trials ALL-BFM 90, ALL-BFM 83, and ALL-BFM 86.
Asterisk indicates that in trials ALL-BFM 83 and ALL-BFM 86, patients treated without reintensification had a significantly poorer outcome. Therefore, these patients were excluded from analysis to reduce the bias in this comparison.