Abstract:
BACKGROUND:Air pollution has many negative health effects on the general population, especially children, subjects with underlying chronic disease and the elderly. The aims of this study were to evaluate the effects of traffic-related pollution on the exacerbation of asthma and development of respiratory infections in Italian children suffering from asthma or wheezing compared with healthy subjects and to estimate the association between incremental increases in principal pollutants and the incidence of respiratory symptoms. METHODS:This prospective study enrolled 777 children aged 2 to 18 years (375 with recurrent wheezing or asthma and 402 healthy subjects). Over 12 months, parents filled out a daily clinical diary to report information about respiratory symptoms, type of medication used and healthcare utilization. Clinical data were combined with the results obtained using an air pollution monitoring system of the five most common pollutants. RESULTS:Among the 329 children with recurrent wheezing or asthma and 364 healthy subjects who completed follow-up, children with recurrent wheezing or asthma reported significantly more days of fever (p=0.005) and cough (p<0.001), episodes of rhinitis (p=0.04) and tracheitis (p=0.01), asthma attacks (p<0.001), episodes of pneumonia (p<0.001) and hospitalizations (p=0.02). In the wheezing/asthma cohort, living close to the street with a high traffic density was a risk factor for asthma exacerbations (odds ratio [OR]=1.79; 95% confidence interval [CI], 1.13-2.84), whereas living near green areas was found to be protective (OR=0.50; 95% CI, 0.31 -0.80). An increase of 10 μg/m3 of particulates less than 10 microns in diameter (PM10) and nitrogen dioxide (NO2) increased the onset of pneumonia only in wheezing/asthmatic children (continuous rate ratio [RR]=1.08, 95% CI: 1.00-1.17 for PM10; continuous RR=1.08, 95% CI: 1.01-1.17 for NO2). CONCLUSIONS:There is a significant association between traffic-related pollution and the development of asthma exacerbations and respiratory infections in children born to atopic parents and in those suffering from recurrent wheezing or asthma. These findings suggest that environmental control may be crucial for respiratory health in children with underlying respiratory disease.
journal_name
BMC Pulm Medjournal_title
BMC pulmonary medicineauthors
Esposito S,Galeone C,Lelii M,Longhi B,Ascolese B,Senatore L,Prada E,Montinaro V,Malerba S,Patria MF,Principi Ndoi
10.1186/1471-2466-14-130subject
Has Abstractpub_date
2014-08-07 00:00:00pages
130issn
1471-2466pii
1471-2466-14-130journal_volume
14pub_type
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