Previous Project

"Health impact of improved air quality during the Olympic Games 2008 in Beijing, China" (2009 - 2015)

Study objectives:
The objective of the study is to assess the effects of improved air quality on mortality and morbidity before and during the 2008 Olympic Games. Moreover, the effects of changes in air quality over the period 2003 to 2009 will be investigated. Data on detailed size-resolved measurements of submicron and ultrafine particles will allow us to distinguish between the health effects of different fractions of particles including very small ones.


Specific aims:

To assess

  •  the effects of improved air quality before and during the 2008 Olympic Games:

    • Impact of concentration reduction of the criteria pollutants PM10, PM2.5, NO2, and SO2 on the association with daily mortality.
    • Impact of reduction in particle number concentrations in different size fractions (between 3 nm to 10 μm) on the association with daily mortality.Quantification of the association between PM10, PM2.5, NO2, SO2, as well as particle number concentrations in different size ranges and cardio-respiratory emergency room visits.
  •   Assessing the effects of changes in air quality over the period 2003 to 2009:
    • Overall assessment of the short-term health effects of preventive measures to reduce air pollution in Beijing.
    • Modification of health effects by meteorological conditions (e.g. heat events).


Study design:

Population based time-series study on acute exposure of air pollutants.


Study population:
Population of the urban area of Beijing (mortality) and residents of the Haidian district (emergency room visits).


Study area:
Beijing, China


Study methods:

Exposure Assessment: Monitoring of particle counts in different size fractions from 3 nm to 10 µm (2004-2009)
Measurement of gaseous components: SO2, NO2
Measurement of meteorological parameters
Health outcomes:Daily counts of all-cause and cause-specific mortality due to cardiovascular and respiratory causes and daily counts of emergency room visits due to cardiovascular and respiratory diseases 
Statistical Methods:   Generalized additive models, Distributed lag models, Time-varying coefficient models



Study period:
January 2003 – December 2009


Current status:
Field work and analyses completed;  paper drafting ongoing.


Investigators:

  • Helmholtz Zentrum München - Institute of Epidemiology I: H.-Erich Wichmann (Principal Investigator)
  • Helmholtz Zentrum München - Institute of Epidemiology II: Annette Peters (Co-PI), Susanne Breitner (data coordination, statistical analysis), Josef Cyrys, Jianwei Gu (exposure assessment), Liqun Liu (statistical analysis), Chang Su (statistical analysis)
  • Helmholtz Center for Environmental research – UFZ, Leipzig-Halle, Section of Exposure Research and Epidemiology/University of Leipzig: Olf Herbarth, Ulrich Franck, Uwe Schlink
  • Leibniz Institute for Tropospheric Research (IfT), Leipzig: Alfred Wiedensohler, Birgit Wehner


Collaboration:

Peking University – Health Science Center, School of Public Health, Department of Occupational and Environmental Health: Xiao-chuan Pan
Peking University – College of Environmental Sciences and Engineering: Tong Zhu, Min Hu


Funding:
German Research Foundation (DFG), Germany (2009-2012)


Related publications:

  • Short-term effects of fine particulate air pollution on cardiovascular hospital emergency room visits: a time-series study in Beijing, China.
    Su C, Breitner S, Schneider A, Liu L, Franck U, Peters A, Pan X.
    Int Arch Occup Environ Health. 2016 May;89(4):641-57. doi: 10.1007/s00420-015-1102-6. Epub 2015 Nov 7.
    Abstract
  • Assessing responses of cardiovascular mortality to particulate matter air pollution for pre-, during- and post-2008 Olympics periods.
    Su C, Hampel R, Franck U, Wiedensohler A, Cyrys J, Pan X, Wichmann HE, Peters A, Schneider A, Breitner S.
    Environ Res. 2015 Oct;142:112-22. doi: 10.1016/j.envres.2015.06.025. Epub 2015 Jun 29.
    Abstract


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