Effects of air pollution on asthma hospitalization rates in different age groups in Hong Kong
Identifieur interne : 003B79 ( Main/Merge ); précédent : 003B78; suivant : 003B80Effects of air pollution on asthma hospitalization rates in different age groups in Hong Kong
Auteurs : F. W. S. Ko ; W. Tam ; T. W. Wong ; C. K. W. Lai ; G. W. K. Wong [Hong Kong] ; T. Leung [Hong Kong] ; S. S. S. Ng ; D. S. C. HuiSource :
- Clinical & Experimental Allergy [ 0954-7894 ] ; 2007-09.
English descriptors
- Teeft :
- Acute exacerbation, Aerodynamic diameter, Allergy, Appropriate degree, Asthma, Asthma admission, Asthma admissions, Asthma emergency department visits, Asthma exacerbation, Asthma exacerbations, Asthma hospitalization, Asthma hospitalization table, Blackwell publishing, Cardiovascular diseases, Chinese university, Cold season, Core model, Current study, Daily admissions, December, Dioxide, Elderly population, Environmental protection department, European approach, European cities, Experimental allergy, Generalized additive models, Group years, Harmful effects, Health effects institute, Hong kong, Hospital admission, Hospital admissions, Hospital authority head, Hospitalization, Hospitalization rates, Journal compilation, Major hospitals, Major outbreak, Meteorological variables, Monitoring stations, Morbidity, National morbidity, Nitrogen dioxide, Nmmaps report, Occup environ, Other studies, Particulate, Particulate matter, Particulate pollution, Pearl river delta region, Pearson residuals, Poisson distribution, Pollutant, Pollutant concentration, Pollutant levels, Pollutant model, Pollution, Pollution study, Previous studies, Quality data, Relative humidity, Relative risk, Research priorities, Respir crit care, Respiratory admissions, Respiratory syndrome, Sensitivity analysis, Sharp decline, Single pollutant model, Statistical modelling, Sulphur dioxide, Supplementary material, Supplementary table, Wales hospital, Warm season, Whole year, World health organisation, World heath organisation.
Abstract
Aims To assess the relationship between levels of ambient air pollutants and hospitalization rates for asthma in Hong Kong (HK). Methods This is a retrospective ecological study. Data of daily emergency hospital admissions to 15 major hospitals in HK for asthma and indices of air pollutants [sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), particulates with an aerodynamic diameter of <10 μm particulate matter (PM10) and 2.5 μm (PM2.5)] and meteorological variables from January 2000 to December 2005 were obtained from several government departments. Analysis was performed by the generalized additive models with Poisson distribution. The effects of time trend, season, other cyclical factors, temperature and humidity were adjusted. Autocorrelation and overdispersion were corrected. Results Altogether, 69 716 admissions were assessed. Significant associations were found between hospital admissions for asthma and levels of NO2, O3, PM10 and PM2.5. The relative risks (RR) for hospitalization for every 10 μg/m3 increase in NO2, O3, PM10 and PM2.5 were 1.028, 1.034, 1.019 and 1.021, respectively, at a lag day that ranged from cumulative lag 0–4 to 0–5. In a multi‐pollutant model, O3 was significantly associated with increased admissions for asthma. The younger age group (0–14 years) tended to have a higher RR for each 10 μg/m3 increase in pollutants than those aged 15–65 years. The elderly (aged 65 years) had a shorter ‘best’ lag time to develop asthma exacerbation following exposure to pollutants than those aged <65 years. Conclusion Adverse effects of ambient concentrations of air pollutants on hospitalization rates for asthma are evident. Measures to improve air quality in HK are urgently needed.
Url:
DOI: 10.1111/j.1365-2222.2007.02791.x
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Methods This is a retrospective ecological study. Data of daily emergency hospital admissions to 15 major hospitals in HK for asthma and indices of air pollutants [sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), particulates with an aerodynamic diameter of <10 μm particulate matter (PM10) and 2.5 μm (PM2.5)] and meteorological variables from January 2000 to December 2005 were obtained from several government departments. Analysis was performed by the generalized additive models with Poisson distribution. The effects of time trend, season, other cyclical factors, temperature and humidity were adjusted. Autocorrelation and overdispersion were corrected. Results Altogether, 69 716 admissions were assessed. Significant associations were found between hospital admissions for asthma and levels of NO2, O3, PM10 and PM2.5. The relative risks (RR) for hospitalization for every 10 μg/m3 increase in NO2, O3, PM10 and PM2.5 were 1.028, 1.034, 1.019 and 1.021, respectively, at a lag day that ranged from cumulative lag 0–4 to 0–5. In a multi‐pollutant model, O3 was significantly associated with increased admissions for asthma. The younger age group (0–14 years) tended to have a higher RR for each 10 μg/m3 increase in pollutants than those aged 15–65 years. The elderly (aged 65 years) had a shorter ‘best’ lag time to develop asthma exacerbation following exposure to pollutants than those aged <65 years. Conclusion Adverse effects of ambient concentrations of air pollutants on hospitalization rates for asthma are evident. Measures to improve air quality in HK are urgently needed.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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