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Phone: (843) 805-6930
West Ashley Library
9 a.m. – 7 p.m.
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John L. Dart Library
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St. Paul's/Hollywood Library
9 a.m. - 8 p.m.
Phone: (843) 889-3300
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Ambient Fine Particulate Matter, Nitrogen Dioxide, and Preterm Birth in New York City.
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- Author(s): Johnson, Sarah; Bobb, Jennifer F.; Kazuhiko Ito; Savitz, David A.; Elston, Beth; Shmool, Jessie L. C.; Dominici, Francesca; Ross, Zev; Clougherty, Jane E.; Matte, Thomas
- Source:
Environmental Health Perspectives. Aug2016, Vol. 124 Issue 8, p1283-1290. 8p. 1 Diagram, 4 Charts, 2 Graphs, 1 Map. - Source:
- Additional Information
- Subject Terms:
- Abstract: BACKGROUND: Recent studies have suggested associations between air pollution and various birth outcomes, but the evidence for preterm birth is mixed. OBJECTIVE: We aimed to assess the relationship between air pollution and preterm birth using 2008-2010 New York City (NYC) birth certificates linked to hospital records. METHODS: We analyzed 258,294 singleton births with 22-42 completed weeks gestation to nonsmoking mothers. Exposures to ambient fine particles (PM2.5) and nitrogen dioxide (NO2) during the first, second, and cumulative third trimesters within 300 m of maternal address were estimated using data from the NYC Community Air Survey and regulatory monitors. We estimated the odds ratio (OR) of spontaneous preterm (gestation < 37 weeks) births for the first- and second-trimester exposures in a logistic mixed model, and the third-trimester cumulative exposures in a discrete time survival model, adjusting for maternal characteristics and delivery hospital. Spatial and temporal components of estimated exposures were also separately analyzed. RESULTS: PM2.5 was not significantly associated with spontaneous preterm birth. NO2 in the second trimester was negatively associated with spontaneous preterm birth in the adjusted model (OR = 0.90; 95% CI: 0.83, 0.97 per 20 ppb). Neither pollutant was significantly associated with spontaneous preterm birth based on adjusted models of temporal exposures, whereas the spatial exposures showed significantly reduced odds ratios (OR = 0.80; 95% CI: 0.67, 0.96 per 10 µg/m³ PM2.5 and 0.88; 95% CI: 0.79, 0.98 per 20 ppb NO2). Without adjustment for hospital, these negative associations were stronger. CONCLUSION: Neither PM2.5 nor NO2 was positively associated with spontaneous preterm delivery in NYC. Delivery hospital was an important spatial confounder. [ABSTRACT FROM AUTHOR]
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