Particulate Air Pollution, Sulfur Dioxide, and Daily Mortality: A Reanalysis of the Steubenville Data
- 1 January 1995
- journal article
- research article
- Published by Taylor & Francis Ltd in Inhalation Toxicology
- Vol. 7 (1), 35-44
- https://doi.org/10.3109/08958379509014269
Abstract
A recent analysis (Schwartz & Dockery, 7992a) reported that particulate air pollution was significantly associated with daily mortality in the Steubenville standard statistical metropolitan area (SMSA), even after adjustment for the effects of weather. This statistically significant association was reported to persist, with no attenuation of the magnitude of the effect, when sulfur dioxide was simultaneously considered in the analysis. We undertook a reanalysis of the Steubenville data. Our main goals were (1) to investigate the robustness of the results obtained from regression analysis of the mortality data, and (2) to examine the effect of specific seasons on the relationship between particulate air pollution and daily mortality. When full-year mortality was analyzed, the effect of particulates was Substantially attenuated when sulfur dioxide was simultaneously included in the regression, and was no longer statistically significant. When mortality data were analyzed by season, similar results were obtained. In addition, there appeared to be seasonal effects in the association of particulates and sulfur dioxide with daily mortality. The results of the analysis were not robust to small perturbations in the data. In view of these findings, it is premature to draw any conclusions about the relationship between individual components of air pollution and daily mortality. Finally, some methodologic issues in the analysis of serial mortality data are discussed.Keywords
This publication has 6 references indexed in Scilit:
- Air Pollution and Daily Mortality in Birmingham, AlabamaAmerican Journal of Epidemiology, 1993
- Increased Mortality in Philadelphia Associated with Daily Air Pollution ConcentrationsAmerican Review of Respiratory Disease, 1992
- Particulate Air Pollution and Daily Mortality in Steubenville, OhioAmerican Journal of Epidemiology, 1992
- Particulate air pollution and daily mortality in detroitEnvironmental Research, 1991
- A new approach to evaluate the impact of climate on human mortality.Environmental Health Perspectives, 1991
- Longitudinal data analysis using generalized linear modelsBiometrika, 1986