Question
The study unit of an ecological study is?
| A. |
Population |
| B. |
Patient |
| C. |
Community |
| D. |
Case |
Show Answer
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Correct Answer � A Explanation |
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An ecological study is an observational study where the population is the main unit of analysis, not individuals.
It examines associations between environmental exposures and health outcomes on a large scale.
While useful in public health, these studies are prone to ecological fallacy—the assumption that group-level associations apply to individuals.
Ecological studies are commonly used to assess the impact of factors like environmental exposures and policies on health outcomes across populations.