Types of observational studies include:
- Descriptive epidemiology
- Analytical epidemiology
- Retrospective studies
- Prospective studies
- Analytical studies

Approaches to Observational Studies in Epidemiology

Studies in which data is gathered from participants without manipulation by the researchers, such as through interviews. May sometimes be the only ethical option for a study. Do not necessarily prove casual relationships, only provide associations to suggest possible causes

University of Notre Dame

Types of epidemiological studies include:

- Observational studies
- Experimental studies

Approaches to Epidemiological Studies

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Observational Studies

Studies in which investigators manipulate the participants to find associations as well as causation; Provide strong evidence for cause/etiology, but must be carefully assessed for bias

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