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E-M:/ ABC News tonight

Enviro-Mich message from "Alex J. Sagady & Associates" <ajs@sagady.com>

You may want to watch ABC national news tonight....

There will be a story about air pollution from roads and effects on health

Effect of exposure to traffic on lung development from 10 to 18 years of age: a cohort study

W James Gauderman,Hita Vora,Rob McConnell,Kiros Berhane,Frank Gilliland,Duncan Thomas,Fred Lurmann,Edward Avol,Nino Kunzli,
Michael Jerrett,John Peters

Background Whether local exposure to major roadways adversely affects lung-function growth during the period of
rapid lung development that takes place between 10 and 18 years of age is unknown.This study investigated the
association between residential exposure to traffic and 8-year lung-function growth.

Methods.  In this prospective study, 3677 children (mean age 10 years participated from 12 southern
California communities that represent a wide range in regional air quality. Children were followed up for 8 years,
with yearly lung-function measurements recorded. For each child,we identified several indicators of residential
exposure to traffic from large roads. Regression analysis was used to establish whether 8-year growth in lung function
was associated with local traffic exposure, and whether local traffic effects were independent of regional air quality.

Findings.  Children who lived within 500 m of a freeway (motorway) had substantial deficits in 8-year growth of forced
expiratory volume in 1 s and maximum midexpiratory flow rate (MMEF) compared with children who lived at least 1500 m from a freeway.
Joint models showed that both local exposure to freeways and regional air pollution had detrimental, and independent, effects on
lung-function growth. Pronounced deficits in attained lung function at age 18 years were recorded for those living
within 500 m of a freeway.

Interpretation.  Local exposure to traffic on a freeway has adverse effects on children's lung development,which are
independent of regional air quality, and which could result in important deficits in attained lung function in later life.

Alex J. Sagady & Associates        http://www.sagady.com

Environmental Enforcement, Permit/Technical Review, Public Policy, 
Expert Witness Review and Litigation Investigation on Air, Water and 
Waste/Community Environmental and Resource Protection
Prospectus at:  http://www.sagady.com/sagady.pdf 

657 Spartan Ave,  East Lansing, MI  48823  
(517) 332-6971; (517) 332-8987 (fax); ajs@sagady.com

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