EVSI for an ongoing study
cancer
CANCER, EVENTS
When a trial is ongoing at the point of decision making, there could be value in reducing uncertainty by collecting additional data from the ongoing trial before making an adoption decision. This is especially common for cost-effectiveness analyses of new cancer drugs, which increasingly rely on immature data obtained from trials in an early stage.We denote the new data collected between the observed follow-up time 
where the first term is the expected value of a decision based on the joint posterior distribution of Events beyond 