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Bias magnification in ecologic studies: a methodological investigation
BACKGROUND: As ecologic studies are often inexpensive to conduct, consideration of the magnitude and direction of ecologic biases may be useful in both study design and sensitivity analysis of results. This paper examines three types of ecologic bias: confounding by group, effect measure modificatio...
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| Formato: | Texto |
| Lenguaje: | English |
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BioMed Central
2007
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1963324/ https://www.ncbi.nlm.nih.gov/pubmed/17615079 http://dx.doi.org/10.1186/1476-069X-6-17 |