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Letters
A novel hypothesis to explain traffic-related nocturnal cough
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).
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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, J Heinrich
Occup. Environ. Med. 2007 64: 8-16.[Abstract] [Full Text] [PDF]
This article has been cited by other articles:
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Joseph, P M
(2009). A novel hypothesis to explain associations of carbon monoxide and nitrogen dioxide with deaths from respiratory disease. J. Epidemiol. Community Health
63: 173-174
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