OBJECTIVE: To examine the relationship between the mean daily concentration of respirable particles arising from bushfire smoke and hospital presentations for asthma. DESIGN AND SETTING: An ecological study conducted in Darwin (Northern Territory, Australia) from 1 April - 31 October 2000, a period characterised by minimal rainfall and almost continuous bushfire activity in the proximate bushland. The exposure variable was the mean atmospheric concentration of particles of 10 microns or less in aerodynamic diameter (PM(10)) per cubic metre per 24-hour period. OUTCOME MEASURE: The daily number of presentations for asthma to the Emergency Department of Royal Darwin Hospital. RESULTS: There was a significant increase in asthma presentations with each 10-microg/m(3) increase in PM(10) concentration, even after adjusting for weekly rates of influenza and for weekend or weekday (adjusted rate ratio, 1.20; 95% CI, 1.09-1.34; P < 0.001). The strongest effect was seen on days when the PM(10) was above 40 microg/m(3) (adjusted rate ratio, 2.39; 95% CI, 1.46-3.90), compared with days when PM(10) levels were less than 10 microg/m(3). CONCLUSION: Airborne particulates from bushfires should be considered as injurious to human health as those from other sources. Thus, the control of smoke pollution from bushfires in urban areas presents an additional challenge for managers of fireprone landscapes.
OBJECTIVE: To examine the relationship between the mean daily concentration of respirable particles arising from bushfire smoke and hospital presentations for asthma. DESIGN AND SETTING: An ecological study conducted in Darwin (Northern Territory, Australia) from 1 April - 31 October 2000, a period characterised by minimal rainfall and almost continuous bushfire activity in the proximate bushland. The exposure variable was the mean atmospheric concentration of particles of 10 microns or less in aerodynamic diameter (PM(10)) per cubic metre per 24-hour period. OUTCOME MEASURE: The daily number of presentations for asthma to the Emergency Department of Royal Darwin Hospital. RESULTS: There was a significant increase in asthma presentations with each 10-microg/m(3) increase in PM(10) concentration, even after adjusting for weekly rates of influenza and for weekend or weekday (adjusted rate ratio, 1.20; 95% CI, 1.09-1.34; P < 0.001). The strongest effect was seen on days when the PM(10) was above 40 microg/m(3) (adjusted rate ratio, 2.39; 95% CI, 1.46-3.90), compared with days when PM(10) levels were less than 10 microg/m(3). CONCLUSION: Airborne particulates from bushfires should be considered as injurious to human health as those from other sources. Thus, the control of smoke pollution from bushfires in urban areas presents an additional challenge for managers of fireprone landscapes.
Authors: Matthew D Ferguson; Erin O Semmens; Emily Weiler; Joe Domitrovich; Mary French; Christopher Migliaccio; Charles Palmer; Charles Dumke; Tony Ward Journal: J Occup Environ Hyg Date: 2017-09 Impact factor: 2.155
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Authors: Gennaro D'Amato; Stephen T Holgate; Ruby Pawankar; Dennis K Ledford; Lorenzo Cecchi; Mona Al-Ahmad; Fatma Al-Enezi; Saleh Al-Muhsen; Ignacio Ansotegui; Carlos E Baena-Cagnani; David J Baker; Hasan Bayram; Karl Christian Bergmann; Louis-Philippe Boulet; Jeroen T M Buters; Maria D'Amato; Sofia Dorsano; Jeroen Douwes; Sarah Elise Finlay; Donata Garrasi; Maximiliano Gómez; Tari Haahtela; Rabih Halwani; Youssouf Hassani; Basam Mahboub; Guy Marks; Paola Michelozzi; Marcello Montagni; Carlos Nunes; Jay Jae-Won Oh; Todor A Popov; Jay Portnoy; Erminia Ridolo; Nelson Rosário; Menachem Rottem; Mario Sánchez-Borges; Elopy Sibanda; Juan José Sienra-Monge; Carolina Vitale; Isabella Annesi-Maesano Journal: World Allergy Organ J Date: 2015-07-14 Impact factor: 4.084
Authors: David M Holstius; Colleen E Reid; Bill M Jesdale; Rachel Morello-Frosch Journal: Environ Health Perspect Date: 2012-05-29 Impact factor: 9.031