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Associations between grass and weed pollen and emergency department visits for asthma among children in Montreal.

Abstract：

CONTEXT AND OBJECTIVE:Asthma among children is a major public health problem worldwide. There are increasing number of studies suggesting a possible association between allergenic pollen and exacerbations of asthma. In the context of global climate change, a number of future climate and air pollution scenarios predict increases in concentrations of pollen, an extension of the pollen season, and an increase in the allergenicity of pollen. The goal of the present study is to evaluate the short-term effects of exposure to grass and weed pollen on emergency department visits and readmissions for asthma among children aged 0-9 years living in Montreal between April and October, 1994-2004. METHODOLOGY AND RESULTS:Time-series analyses were carried out using parametric log-linear overdispersed Poisson models that were adjusted for temporal variations, daily weather conditions (temperature, atmospheric pressure), and gaseous air pollutants (ozone and nitrogen dioxide). We have found positive associations between emergency department visits and concentrations of grass pollen 3 days after exposure. The effect of grass pollen was higher on emergency department readmissions as compared to initial visits. Weak negative associations were found between weed pollen (including ragweed pollen) and emergency department visits 2 days after exposure. CONCLUSION:The data indicate that among children, emergency department visits increased with increasing concentrations of grass pollen.

journal_name

Environ Res

journal_title

Environmental research

authors

Héguy L,Garneau M,Goldberg MS,Raphoz M,Guay F,Valois MF

doi

10.1016/j.envres.2007.10.005

subject

Has Abstract

pub_date

2008-02-01 00:00:00

pages

203-11

issue

2

eissn

0013-9351

issn

1096-0953

pii

S0013-9351(07)00223-X

journal_volume

106

pub_type

杂志文章

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