Los estudios epidemiologicos ecológicos en epidemias

Abstract

The description of an epidemic in person, place, or time may involve comparisons of groups of individuals that, with due attention to statistical and inferential issues at the group or individual level, can elevate our measurement exercise to the stature of an ecological study. With several examples we illustrate why this is one of the most widely used, though less recognized by public health epidemiologists, study designs.