This statistic reports the time at which half of the candidates registered on the waiting list would receive a transplant, if they remained active on the waiting list. It is calculated using the successive rates of transplantation seen at each time after registration, among candidates who remain active on the waiting list (dropping candidates when they die or are removed from the waiting list and excluding inactive times). This time is generally shorter than the median time to transplant since it uses transplant rates among those who remain active on the waiting list.