Temporal relationship between air pollution and hospital admissions for asthmatic children in Hong Kong

Citation
Gwk. Wong et al., Temporal relationship between air pollution and hospital admissions for asthmatic children in Hong Kong, CLIN EXP AL, 31(4), 2001, pp. 565-569
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Clinical Immunolgy & Infectious Disease",Immunology
Journal title
CLINICAL AND EXPERIMENTAL ALLERGY
ISSN journal
0954-7894 → ACNP
Volume
31
Issue
4
Year of publication
2001
Pages
565 - 569
Database
ISI
SICI code
0954-7894(200104)31:4<565:TRBAPA>2.0.ZU;2-T
Abstract
Background Many epidemiological studies have shown positive association bet ween respiratory health and current levels of outdoor air pollution in Euro pe and America. Objective The aim of this study was to investigate the association between air pollution and the number of childhood admissions for asthma in Hong Kon g. Methods Daily counts of childhood admission for asthma to a large teaching Hospital were obtained from the computerized database for the period 1993-1 994. A Poisson regression allowing for seasonal patterns and meteorological conditions was used to assess the associations between the number of Hospi tal admissions and the three pollutants: nitrogen dioxide, sulphur dioxide and inhalable particles (measured as PM10, particles < 10 mum in aerodynami c diameter). Results A total of 1217 children under 15 years of age were admitted for as thma during the study period. The calculated annual hospitalization rates w ere 283 and 178 per 100 000 for boys and girls, respectively. The mean PM10 , NO2 and SO2 levels were 44.1 mug/m(3), 43.3 mug/m(3), and 12.2 mug/m(3), respectively. Daily admission for asthma increased significantly with incre asing ambient level of nitrogen dioxide (relative risk (RR) = 1.08 per 10 m ug/m(3) increase), sulphur dioxide (RR = 1.06) and inhalable particles (RR = 1.03). No association was found between hospital admission and humidity, temperature or atmospheric pressure. Conclusion This is the first daily time series study of childhood admission s for asthma and air pollution in Hong Kong. The results support that curre nt levels of air pollution contribute to the respiratory morbidity in asthm atic children in Hong Kong.