Etiology vs. Epidemiology — What's the Difference?

Etiology (pronounced ; alternatively: aetiology or ætiology) is the study of causation or origination. The word is derived from the Greek αἰτιολογία (aitiología) "giving a reason for" (αἰτία, aitía, "cause"; and -λογία, -logía).

Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in defined populations. It is a cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying risk factors for disease and targets for preventive healthcare.

The study of causes or origins.

The branch of medicine which deals with the incidence, distribution, and possible control of diseases and other factors relating to health.

The branch of medicine that deals with the causes or origins of disease.

The branch of medicine that deals with the study of the causes, distribution, and control of disease in populations.

Assignment of a cause, an origin, or a reason for something.

(sciences) The branch of science dealing with the spread and control of diseases, viruses, concepts etc. throughout populations or systems.

The cause or origin of a disease or disorder as determined by medical diagnosis.

(sciences) The epidemiological body of knowledge about a particular thing.

Standard spelling of aetiology

That branch of medicine which studies the incidence and distribution of disease in a population, and uses such information to find the causes, modes of transmission, and methods for control of disease.

The science of causes. Same as tiology.

The branch of medical science dealing with the transmission and control of disease

The cause of a disease

The philosophical study of causation