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Title (Primary) Size-segregated particle number concentrations and respiratory emergency room visits in Beijing, China
Author Leitte, A.M.; Schlink, U.; Herbarth, O.; Wiedensohler, A.; Pan, X.C.; Hu, M.; Richter, M.; Wehner, B.; Tuch, T.; Wu, Z.; Yang, M.; Liu, L.; Breitner, S.; Cyrys, J.; Peters, A.; Wichmann, H.-E.; Franck, U.;
Journal Environmental Health Perspectives
Year 2011
Department STUDIEN;
Volume 119
Issue 4
Language englisch;
Abstract Background: The link between concentrations of particulate matter and respiratory morbidity has been investigated in numerous studies. Objectives: The aim of this study was to analyze the role of different particle size fractions with respect to respiratory health in Beijing, China.Methods: Data on particle size distributions from 3 nm to 1 ┬Ám; PM10, NO2, and SO2 concentrations; and meteorological variables were collected daily during March 2004 to December 2006. Concurrently, daily counts of emergency room visits (ERV) for respiratory diseases were obtained from the Peking University Third Hospital. We estimated pollutant effects in single- and two-pollutant generalized additive models, controlling for meteorological and other time-varying covariates. Time-delayed associations were estimated using polynomial distributed lag, cumulative effects, and single lag models.Results: Associations of respiratory ERV with NO2 concentrations and 100 - 1000 nm particle number or surface area concentrations were of similar magnitude, i.e. ~ 5 % increase in respiratory emergency room visits with an interquartile range increase in air pollution concentration. In general, particles < 50 nm were not positively associated with ERV, whereas particles 50 - 100 nm were adversely associated with respiratory ERV, both being fractions of ultrafine particles. Effect estimates from two-pollutant models were most consistent for NO2.Conclusions: Present levels of air pollution in Beijing were adversely associated with respiratory ERV. NO2 concentrations seemed to be a better surrogate for evaluating overall respiratory health effects of ambient air pollution than PM10 or particle number concentrations in Beijing.
ID 10926
Persistent UFZ Identifier
Leitte, A.M., Schlink, U., Herbarth, O., Wiedensohler, A., Pan, X.C., Hu, M., Richter, M., Wehner, B., Tuch, T., Wu, Z., Yang, M., Liu, L., Breitner, S., Cyrys, J., Peters, A., Wichmann, H.-E., Franck, U. (2011):
Size-segregated particle number concentrations and respiratory emergency room visits in Beijing, China
Environ. Health Perspect. 119 (4), 508 - 513