It can be difficult to explain epidemiological
methods--as well as the strengths and limitations of those methods.
None of these epidemiological
features characterized the great out breaks of bubonic plague in nineteenth- and twentieth-century India and China, which form the basis of modern plague understanding.
A growing body of epidemiological
data links prenatal pesticide exposure (crossing the placenta during fetal development), as well as exposure during the first years of a child's life, to a variety of health issues including low birth weight, birth defects, abnormal neurological development and reproductive problems.
And several large epidemiological
studies suggest that trans fat poses an even greater heart disease risk than its effects on cholesterol levels would explain.
observations have generated promising leads to preventive treatments, including statins, antioxidant compounds, anti-inflammatory drugs, and, for women, female sex hormones.
SIR - You quote Dr Brian John, spokesman for GM free Cymru (GM crop opponents blasted, March 23) as saying that no-one had shown that GM food was safe to eat, and in addition 'there has not been a single epidemiological
study on the effect on the human body of eating GM food'.
Content includes commentary and analysis on public health issues, epidemiological
reports, news and CLE courses, as well as articles from relevant Journals and magazines.
Furthermore, PHC doesn't take into account the effects of the epidemiological
transition now being witnessed in both the developed world and increasing parts of the developing world --specifically Asia.
However, there is a very large body of epidemiological
and clinical evidence to support the position that obesity does indeed pose a significant health risk.
study released last month by the National Cancer Institute concludes that low-level exposures to formaldehyde do not appear to increase cancer risks in humans.
By noting the uncounted dead--and by lamenting that Uncle Len's cause of death cannot be stated with certainty--Davis turns her lack of hard numbers, which by epidemiological
standards would be considered a weakness, into a rhetorical asset.
Whether or not the compounds would have the same effect in humans is not known, but epidemiological
studies support that theory, including a recent prospective study of prostate cancer risks.