1. Administrative information
AgeX: Nationwide cluster-randomised trials in England of extending the NHS breast screening age range
Statistical analysis plan for the 2025-33 follow-up phase, after randomisation of 4.5 million women in 2009-20 and, in 2020-24, consolidation of long-term data linkage and finalisation of the
ISRCTN registration: ISRCTN3392440
ClinicalTrials.gov identifier: NCT01081288