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Definition of Ecological study

Ecological study Definition from Medicine Dictionaries & Glossaries
EUFIC Nutrition Glossary
A study that compares the rates of exposures and diseases in different populations using aggregate data on exposure and disease, not individual data.
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Ecological study Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Ecological studies are studies of risk-modifying factors on health or other outcomes based on populations defined either geographically or temporally. Both risk-modifying factors and outcomes are averaged for the populations in each geographical or temporal unit and then compared using standard statistical methods.

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