EDITORIALS
Long-term exposures to air pollution
Long-term exposures to air pollution
Correspondence to:
Professor Jon G Ayres, Department of Environmental and Occupational Medicine, University of Aberdeen, Foresterhill Road, Aberdeen AB25 2ZP, UK; j.g.ayres@abdn.ac.uk
Methodological problems of retrospective studies
| The first 150 words of the full text of this article appear below. |
In the 1980s the comfortable belief that air pollution was no longer a public health issue was shaken by the appearance of the Six Cities study from the USA which revealed dose-related health effects (ranging from symptoms to mortality) at levels of air pollutants at that time considered to be safe.1 Since then there has been a dramatic rise in the number of publications on air pollution from all parts of the world which have resulted in two broad outcomes: a far better understanding of the mechanisms by which ostensibly "low" concentrations of pollutants impact on the lung and increasing awareness within governments of the need to tighten air quality standards. Most epidemiological studies over this time have considered the effects of day-to-day changes in air pollution on daily events such as deaths and hospital admissions (so-called time-series studies).2 While these studies are in theory
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Thorax 2007 62: 1088-1094.[Abstract] [Full Text] [PDF]
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