The cost of preventing an event (COPE statistic) estimates the cost of preventing an event, starting with the number needed to treat (NNT).
Parameters:
(1) number needed to treat (NNT)
(2) number of years of treatment needed to prevent 1 event
(3) cost per day of the treatment
COPE =
= (NNT) * (years) * (365 days per year) * (cost per day)
