Ecological Clinical Study

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An Ecological Clinical Study is an Observational Clinical Study that compares clusters of people that are usually grouped based on their geographical location or temporal associations.



References

2016

(...)

Ecological studies have played important roles in understanding how diet affects risk of disease. A 1975 multicountry ecological study linked dietary factors to cancer incidence rates in 23 countries and mortality rates in 32 countries[1].

2014a

  1. Sander Greenland (2001). "Ecologic versus individual-level sources of bias in ecologic estimates of contextual health effects". In: International Journal of Epidemiology, 30(6):1343–1350, DOI:10.1093/ije/30.6.1343

2014b