I have a group of 1444 patients that have been included in a group of different trials. The trials found that none (zero) of the patients had a specific complication (independent). The known incidence of the complication in this group is 0.5%-0.6%. (suggesting there should have been about 7-8 events)
I need to know what the probability of finding zero complications given the known event rate of 0.5% in a population size of 1444 (no repeat measures, all independent events).