Document Detail

Ozone, area social conditions, and mortality in Mexico City.
MedLine Citation:
PMID:  15016589     Owner:  NLM     Status:  MEDLINE    
We investigated whether the association of daily mortality and ambient ozone differs by age and area social conditions of the region of residence using a time-series analysis. The study setting was metropolitan Mexico City, a high altitude city situated in a valley, with an estimated 20 million inhabitants, large socioeconomic gradients, and ozone levels frequently exceeding international standards. We stratified daily deaths by six census-derived socioeconomic indicators, based on characteristics of the county where decedents lived. We used Poisson regression to model the association between daily mortality and ozone levels (on the day of death and the previous day) in separate models, stratified by area socioeconomic level and age, and controlling for time trends and temperature. Ozone was positively associated with total mortality [0.65% increase per 10 ppb increment, 95% confidence interval (CI): 0.02%, 1.28%] and for mortality among those over age 65 [1.39% increase per 10 ppb increment, 95% CI: 0.51%, 2.28%]. Associations between ozone and all-age mortality did not show any consistent patterns according to socioeconomic gradients. We conclude that elderly people are at higher risk for ozone-associated mortality. Though county-level social indicators in Mexico City were not strong markers of vulnerability to ozone-associated acute mortality in this analysis, complex associations between individual and area-level factors may exist that would require additional data and further analyses to elucidate.
Marie S O'Neill; Dana Loomis; Victor H Borja-Aburto
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Environmental research     Volume:  94     ISSN:  0013-9351     ISO Abbreviation:  Environ. Res.     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-03-12     Completed Date:  2004-05-14     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0147621     Medline TA:  Environ Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  234-42     Citation Subset:  IM    
Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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MeSH Terms
Age Factors
Air Pollutants / toxicity*
Models, Statistical
Ozone / toxicity*
Regression Analysis
Social Conditions / statistics & numerical data*
Urban Health / statistics & numerical data*
Grant Support
5 T32 ES07069-22/ES/NIEHS NIH HHS
Reg. No./Substance:
0/Air Pollutants; 10028-15-6/Ozone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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