Definitions for "Epidemiological study"
examination of the distribution of disease as well as the determining factors related to specific diseases or health-related problems in a specific population.
Research on the incidence, distribution, control, and/or cause of diseases, health trends, or disorders by studying populations.
Determination of causes of disease (e.g., lung cancer) through the study and comparison of large populations of people living in different locations or following different lifestyles and/or habits (e.g., smoking versus nonsmoking).