The objective of this scoping review is to investigate the outcomes measured and reported in trials of children with refractory epilepsy treated with ketogenic diet therapy. The scoping review will aim to list the outcomes and map the associated components including intervention (type of ketogenic diet therapy), definition (if used) of the outcome, the tool or indicators used to measure the outcome, validity of tool used, the time from intervention commencement to measurement of the outcome and the reporting of the outcome.Specifically, the review question is: What outcomes are measured and reported in studies of childhood epilepsy treated with ketogenic diet therapy?