Ecological Studies also referred to as correlational studies examine the correlation between specific exposure and disease rates in large groups and populations.

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Descriptive Studies
Correlational, or Ecological Studies
Etiological, or Analytical Studies

Types of Epidemiological Studies

Principles of Epidemiology. (n.d.). United States Center for Disease Control. Retrieved July 19, 2020, from https://www.cdc.gov/csels/dsepd/ss1978/lesson6/section2.html

Principles of Epidemiology

Descriptive studies categorize different diseases and analyze them based on which category they fall into. Descriptive studies do not typically have a hypothesis, but rather describe observed patterns of the disease.

Descriptive Studies

Ecological Studies

Etiological Studies also called Analytical Studies are studies conducted around individuals and specific hypotheses on how a certain disease accumulates.

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