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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

Publication Detail

Title: Exposure error masks the relationship between traffic-related air pollution and heart rate variability.

Authors: Suh, Helen H; Zanobetti, Antonella

Published In J Occup Environ Med, (2010 Jul)

Abstract: We examined whether more precise exposure measures would better detect associations between traffic-related pollution, elemental carbon (EC), nitrogen dioxide (NO2), and heart rate variability (HRV).Repeated 24-hour personal and ambient PM2.5, EC, and NO2 were measured for 30 people living in Atlanta, GA. The association between HRV and either ambient concentrations or personal exposures was examined using linear mixed effects models.Ambient PM2.5, EC, NO2, and personal PM2.5 were not associated with HRV. Personal EC and NO2 measured 24 hours before HRV were associated with decreased RMSSD, PNN50, and HF and with increased LF/HF. RMSSD decreased by 10.97% (95% confidence interval: -18.00 to -3.34) for an inter-quartile range change in personal EC (0.81 microg/m3).Results indicate decreased vagal tone in response to traffic pollutants, which can best be detected with precise personal exposure measures.

PubMed ID: 20595912 Exiting the NIEHS site

MeSH Terms: No MeSH terms associated with this publication

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