Published by Oxford University Press on behalf of the International Epidemiological Association © The Author 2006; all rights reserved.
Editor's Choice |
The future of modern epidemiology: genetics, methods, and history
E-mail: Shah.ebrahim@lshtm.ac.uk
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It's all genetic. A confusing aspect of genetics is the concept of heritability. Obesity is highly heritable, as shown by its higher concordance among identical compared with non-identical twins. But obesity appears to be environmentally determined as its rising prevalence indicates. In this issue we reprint Lewontin's1 article, which provides an important discussion on causation in human genetics. He distinguishes two categories of causal question: first, that