Which term most accurately describes the following definition? "A study that examines the relationship between diseases (or othe
r health outcomes) and other variables of interest as they exist in a defined population at one particular time." [Porta M, ed. A Dictionary of Epidemiology. New York: Oxford University Press; 2014.
Epidemiology is the branch of medicine that studies the presence, distribution, causes and best means of control of disease in the people of a given region at a particular time. It comes from the Greek epi- (on top of) and demos (people).
