... 3St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada, 4Institute for Clinical Evaluative Sciences, University of Toronto, Toronto, Ontario, Canada, 5Harvard Humanitarian ... usually use the 95% CI, the range that includes the true mortality rate 95% of the time. The narrower the CI, the closer the lower and upperboundaries of the CI are to the point estimate, the greaterour ... questionwhether the population studied and the period of timethat the survey took place might differ from our own situ-ation. In order for findings to be useful, they should to besimilar to the current...