Effect of Air Pollution on Respiratory Diseases in Western China

Transcription

1 College of Atmospheric Sciences, Lanzhou University Key Laboratory for Semi-Arid Climate Change of the Ministry of Education Effect of Air Pollution on Respiratory Diseases in Western China 兰州大学大气科学学院

2 Outline Geographic Position Materials and Methods Effect of air pollution on respiratory diseases in Lanzhou Summary

3 Outline Materials and Methods Effect of air pollution on respiratory diseases in Lanzhou Summary

4 Background Ambient air pollution is a global public health concern that is estimated to cause approximately 3.7 million premature deaths worldwide per year. Lanzhou is one of the severely polluted cities in China, even in the world.

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6 Geographical Position of Lanzhou (36.03 N,03.53 E) (39.9 N,6.3 E) Lanzhou Beijing

7 Geographical Position of Lanzhou China Yellow River

8 Desertification Area

9 Map of Precipitation in China Semi-Arid Areas Arid Areas 9.460C(74a) 30.2mm(53a) Semi-humid Areas Humid Areas

10 Outline Geographic Position Effect of air pollution on respiratory diseases in Lanzhou Summary

11 Materials Methods Daily ER visits were collected between March 2007 and 3 May 20 from three large-scale comprehensive top-level hospitals in Lanzhou. The daily ambient air concentrations of PM0, SO2 and NO2 in the urban district of Lanzhou. Dust day: if there is a dust event, it is defined as a dust day. Dust events:dust storms (horizontal visibility less than 000 m),blowing dust (000-0,000m),and floating dust (more than 0,000m) Generalized additive model (GAM) log[ E( Yt)] s( time, df ) DOW Holiday s( temperature, df ) s( humidity, df ) Zt

12 Outline 2 Geographic Position Materials and Methods 3 4 Summary

13 Air Pollution Index (API) State Environmental Protection Administration uses 5 API levels to determine the air quality. The API value in the range of 0-50 indicates excellent air quality (i.e. grade ), good air quality (i.e. grade 2); slightly polluted (i.e. grade 3); 5-200, lightly polluted, moderately polluted (i.e. grade 4A); moderate-heavily polluted (i.e. grade 4B), and >300, heavily polluted.

14 RRs (95%CIs) of ER visits with an increase of 0 µg/m3 in air pollutants

15 RRs (95%CIs) of ER visits with an increase of 0 µg/m3 in air pollutants sex age

16 RRs (95%CIs) of ER visits with an increase of 0 µg/m3 in air pollutants

17 RRs (95%CIs) of ER visits with an increase of 0 µg/m3 in air pollutants

18 RRs (95%CIs) of ER visits with an increase of 0 µg/m3 in air pollutants

19 RRs (95% CIs) per 0 µg/m3 increase in PM0, SO2 and NO2 on ER visits in single and multiple pollutant models Models/P M 0 RR (95% CI) p SO 2 RR (95% CI) Non-dust days PM ( ) +SO 2 +NO ( ) Dust days PM 0.40 (.07.2) +SO 2 +NO (.0.6) <0.0 <0.0 < SO 2 ( ) +PM NO ( ) SO 2 ( ) +PM NO ( ) p NO 2 RR (95% CI) <0.0 NO 2 ( ) <0.0 +PM SO ( ) <0.0 NO 2 ( ) <0.0 +PM SO ( ) p <0.0 <0.0 <0.0 <0.0

20 Outline 2 Geographic Position Materials and Methods 3 4

21 2. Air pollution has different lag effects on respiratory diseases. 3.The effect of NO2 on ER visits is greater for total females and adults than other groups. But age and sex stratified analysis show that PM0 at in elderly females, NO2 in adult males elderly, and SO2 in elderly males were significantly greater than other groups..the effects of air pollutants were obviously different on non-dust days and dust days. 4.The stronger effects of air pollution in spring might be also attributed to the special valley basin of Lanzhou. 26 October 206 2

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23 College of Atmospheric Sciences, Lanzhou University Key Laboratory for Semi-Arid Climate Change of the Ministry of Education