Definitions for "Case Control Study"
The comparison of individuals with a certain illness to similar healthy individuals, matched by age, sex or other factors in order to define risk factors for the illness.
A study in which diseased and non-diseased groups are compared with respect to past exposures or other characteristics
A scientific study that compares a group of people with disease (such as leukemia) to a similar group of people without that disease. This type of study compares the levels of exposure (radiation or chemical) each group had before appearance of the disease.