Air Pollution Exposure Assessment for Epidemiologic Studies of Pregnant Women and Children: Lessons Learned from the Centers for Children's Environmental Health and Disease Prevention Research

• Published in: Environmental health perspectives Vol. 113; no. 10; pp. 1447 - 1454
• Main Authors: Gilliland, Frank, Avol, Ed, Kinney, Patrick, Jerrett, Michael, Dvonch, Timothy, Lurmann, Frederick, Buckley, Timothy, Breysse, Patrick, Keeler, Gerald, de Villiers, Tracy, McConnell, Rob
• Format: Journal Article
• Language: English
• Published: United States National Institute of Environmental Health Sciences. National Institutes of Health. Department of Health, Education and Welfare 01.10.2005; National Institute of Environmental Health Sciences
• Subjects: Air pollutants; Air Pollutants - toxicity; Air pollution; Air pollution effects; Asthma; Asthma in children; Biological markers; Chemical hazards; Child; Child Welfare; Children; Environmental Exposure; Environmental Health; Exposure; Female; Humans; Indoor air pollution; Microenvironments; Mini-Monograph; Pollutants; Pollution monitoring; Pregnancy; Pregnancy Outcome; Prevention; Preventive Medicine; Traffic estimation; United States; United States
• ISSN: 0091-6765; 1552-9924
• DOI: 10.1289/ehp.7673

The National Children's Study is considering a wide spectrum of airborne pollutants that are hypothesized to potentially influence pregnancy outcomes, neurodevelopment, asthma, atopy, immune development, obesity, and pubertal development. In this article we summarize six applicable exposure assessment lessons learned from the Centers for Children's Environmental Health and Disease Prevention Research that may enhance the National Children's Study: a) Selecting individual study subjects with a wide range of pollution exposure profiles maximizes spatial-scale exposure contrasts for key pollutants of study interest. b) In studies with large sample sizes, long duration, and diverse outcomes and exposures, exposure assessment efforts should rely on modeling to provide estimates for the entire cohort, supported by subject-derived questionnaire data. c) Assessment of some exposures of interest requires individual measurements of exposures using snapshots of personal and microenvironmental exposures over short periods and/or in selected microenvironments. d) Understanding issues of spatial-temporal correlations of air pollutants, the surrogacy of specific pollutants for components of the complex mixture, and the exposure misclassification inherent in exposure estimates is critical in analysis and interpretation. e) "Usual" temporal, spatial, and physical patterns of activity can be used as modifiers of the exposure/outcome relationships. f) Biomarkers of exposure are useful for evaluation of specific exposures that have multiple routes of exposure. If these lessons are applied, the National Children's Study offers a unique opportunity to assess the adverse effects of air pollution on interrelated health outcomes during the critical early life period.