Previously in this series I have given an overview of the main types of study design and the techniques used to minimise biased results In this article I describe more fully ecological studies their u ID: 892672
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1 Study Design VI - Ecological StudiesKate
Study Design VI - Ecological StudiesKate Ann LevinChild and Adolescent Health Research Unit, University of Edinburgh, Edinburgh, Scotland, UK Previously in this series I have given an overview of the main types of study design and the techniques used to minimise biased results. In this article I describe more fully ecological studies, their uses, advantages and limitations.Evidence-Based Dentistry (2003) 7, 60-61. doi:10.1038/sj.ebd.6400454An ecological study is an observational study defined by the level at which data are analysed, namely at the population or group level, rather than individual level. Ecological studies are often used to measure prevalence TOOLBOX 108 www.nature.com/ebd