Ozone, Suspended Particulates, and Daily Mortality in Mexico City

To investigate acute, irreversible effects of exposure to ozone and other air pollutants, the authors examined daily death counts in relation to air pollution levels in Mexico City during 1990–1992. When considered singly in Poisson regression models accounting for penodic effects, the rate ratio fo...

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Bibliographic Details
Published in:American journal of epidemiology 1997-02, Vol.145 (3), p.258-268
Main Authors: Borja-Aburto, Victor H., Loomis, Dana P., Bangdiwala, Shnkant I., Shy, Carl M., Rascon-Pacheco, Ramon A.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Air Pollutants - adverse effects
Air Pollutants - analysis
air pollution
Air. Soil. Water. Waste. Feeding
Biological and medical sciences
Child
Child, Preschool
Confidence Intervals
Death Certificates
environment
Environment. Living conditions
Environmental Monitoring
Epidemiological Monitoring
Female
Humans
Infant
Infant, Newborn
Male
Medical sciences
Mexico - epidemiology
Middle Aged
Mortality
Ozone - adverse effects
Ozone - analysis
Public health. Hygiene
Public health. Hygiene-occupational medicine
Regression Analysis
Risk Factors
Urban Health
Weather
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Summary:To investigate acute, irreversible effects of exposure to ozone and other air pollutants, the authors examined daily death counts in relation to air pollution levels in Mexico City during 1990–1992. When considered singly in Poisson regression models accounting for penodic effects, the rate ratio for total mortality associated with a 100-ppb increment in 1-hour maximum ozone concentration was 1 024 (95% confidence interval (Cl) 1.011–1.039). Measures of average ozone concentration were somewhat more strongly related to mortality. The rate ratio was 1.024 (95% Cl 0.984–1.062) per 100 ppb for sulfur dioxide and 1 050 (95% Cl 1.030–1.067) per 100 μg/m3 for total suspended particulates. However, when all three pollutants were considered simultaneously, only total suspended particulates remained associated with mortality, indicating excess mortality of 6% per 100 μg/m3 (rate ratio = 1.058, 95% Cl 1.033–1.083), consistent with observations in other cities in the United States and Europe. The authors found no independent effect of ozone, but it is difficult to attnbute observed effects to a single pollutant in light of the complexity and variability of the mixture to which people are exposed. Nevertheless, particulate matter may be a useful indicator of the nsk associated with ambient air pollution. Am J Epidemiol 1997; 145: 258-68
ISSN:0002-9262
1476-6256
DOI:10.1093/oxfordjournals.aje.a009099