We assessed prognostic factors of overall survival (OS) in 248 children and adolescents enrolled in 21 phase I trials between 2000–2014.
Performance status of 90–100% and school/work attendance at enrolment were strong indicators of longer OS.
Adult predictive scores (RMH and MDACC) correlated with survival in adolescents (12–17 years), but not in children (2–11 years).
These findings may orientate about potential prognoses and could lead to paediatric-adapted eligibility criteria in early phase trials.