Occup Environ Med

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Occupational and Environmental Medicine 2008;65:575; doi:10.1136/oem.2007.038711
Copyright © 2008 by the BMJ Publishing Group Ltd.
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POSTSCRIPT

Letters

A novel hypothesis to explain traffic-related nocturnal cough

Peter M Joseph

Correspondence to:
School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, 19104-4283, USA; joseph@rad.upenn.edu


Accepted 24 January 2008

The first 150 words of the full text of this article appear below.

I am writing to comment on the paper entitled "Respiratory health and individual estimated exposure to traffic-related air pollutants in a cohort of young children" (Occup Environ Med 2007;64:8–16). The paper looked at the health effects of various components of air pollution as they depended on distance from major traffic arteries in and around Munich, Germany.

The key finding I want to examine is the observed association of ambient nitrogen dioxide (NO2) levels and nocturnal cough in very young children.

Morgenstern’s Table 4 shows that NO2 concentrations varied from 19.4 to 71.7 µg/m3, with a mean of 35.4. Those concentrations are much lower than those that have been demonstrated to have harmful effects, at least in adults. According to one authoritative review1 there is little evidence that NO2 has any respiratory effect, even on asthmatics, at concentrations less than 200 ppb (376 µg/m3).

. . . [Full text of this article]


Relevant Article

Respiratory health and individual estimated exposure to traffic-related air pollutants in a cohort of young children
V Morgenstern, A Zutavern, J Cyrys, I Brockow, U Gehring, S Koletzko, C P Bauer, D Reinhardt, H-E Wichmann, and J Heinrich
Occup. Environ. Med. 2007 64: 8-16. [Abstract] [Full Text] [PDF]





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