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Author Iskandar, A.; Andersen, Z.J.; Bonnelykke, K.; Ellermann, T.; Andersen, K.K.; Bisgaard, H. url  doi
  Title Coarse and fine particles but not ultrafine particles in urban air trigger hospital admission for asthma in children Type Journal Article
  Year (down) 2012 Publication Thorax Abbreviated Journal Thorax  
  Volume 67 Issue 3 Pages 252-257  
  Keywords Adolescent; Age Factors; Asthma/epidemiology/*etiology; Child; Child, Preschool; Cross-Over Studies; Denmark/epidemiology; Environmental Monitoring/methods; Epidemiological Monitoring; Hospitalization/*statistics & numerical data; Humans; Infant; Infant, Newborn; Nitrogen Dioxide/adverse effects/analysis; Nitrogen Oxides/adverse effects/analysis; *Particle Size; Particulate Matter/*adverse effects/analysis; Sex Factors; Urban Health/statistics & numerical data  
  Abstract BACKGROUND: Short-term exposure to air pollution can trigger hospital admissions for asthma in children, but it is not known which components of air pollution are most important. There are no available studies on the particular effect of ultrafine particles (UFPs) on paediatric admissions for asthma. AIM: To study whether short-term exposure to air pollution is associated with hospital admissions for asthma in children. It is hypothesised that (1) the association between asthma admissions and air pollution is stronger with UFPs than with coarse (PM10) and fine (PM2.5) particles, nitrogen oxides (NOx) or nitrogen dioxide (NO2); and (2) infants are more susceptible to the effects of exposure to air pollution than older children. METHOD: Daily counts of admissions for asthma in children aged 0-18 years to hospitals located within a 15 km radius of the central fixed background urban air pollution measurement station in Copenhagen between 2001 and 2008 were extracted from the Danish National Patient Registry. A time-stratified case crossover design was applied and data were analysed using conditional logistic regression to estimate the effect of air pollution on asthma admissions. RESULTS: A significant association was found between hospital admissions for asthma in children aged 0-18 years and NOx (OR 1.11; 95% CI 1.05 to 1.17), NO2 (1.10; 95% CI 1.04 to 1.16), PM10 (1.07; 95% CI 1.03 to 1.12) and PM2.5 (1.09; 95% CI 1.04 to 1.13); there was no association with UFPs. The association was stronger in infants than in older children for all pollutants, but no statistically significant interaction was detected. CONCLUSION: Short-term exposure to air pollution can trigger hospital admission for asthma in children, with infants possibly being most susceptible. These effects seemed to be mediated by larger particles and traffic-related gases, whereas UFPs showed no effect.  
  Address Copenhagen Prospective Studies on Asthma in Childhood, Health Sciences, University of Copenhagen, Copenhagen University Hospital, Ledreborg Alle 34, 2820 Gentofte, Denmark  
  Corporate Author Thesis  
  Impact Factor 08,290 First Author Iskandar, A. Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Senior Author Bisgaard, H.  
  ISSN 0040-6376 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:22156960 Approved no  
  Call Number Serial 72  
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