The Short-term Impact of Air Pollution on the Mortality. Results of the EMECAM Project in the city of Seville, 1992-1996

Abstract

Background: As part of the EMECAM Project, the objective of this study is that of assessing the impact of air pollution on the daily death rate in Seville throughout the 1992-1996 period. Methods: During the 1992-1996 period, readings were taken daily of the amounts of SO2, particles in suspension (PM10) and NO2 present in the air in the city of Seville, in addition to the number of deaths daily due to different causes. For analyzing this data, a multivariable Poisson regression model was used for modeling each one of the causes of death in terms of the air inmission readings, controlling other confusion-causing variables. Results: A relationship was found to exist between the rises in the NO2 levels and the daily death rate throughout the months of May to October. For each 10 ngr/m3 rise, the risk of death or all causes showed a 2% rise, the same rise in the NO2 levels leading to a 3% rise in the risk of death resulting from cardiovascular diseases. Conclusions: A relationship exists between the levels of NO2 air pollution and the daily death rate in Seville. The findings provide scientific knowledge and information which can be of use for preventing the impact of air pollution on human health.