ABSTRACT
Objective To assess the relationship between acute exposure to gaseous air pollutants (SO2, NO2) and daily mortality in Shanghai. Methods Semi-parametric generalized additive model was used to analyze the relationship between SO2/NO2 concentrations and daily death numbers from January 1, 2001 to December 31, 2004 in the urban area of Shanghai after adjustment for the long-term trend of death, weather conditions, and "days of the week" effect. Results An increase of 10 ?g/m3 of SO2 could increase the total mortality, cardiovascular disease mortality and respiratory disease mortality by 1.25%(95%CI: 0.85%-1.65%), 1.45%(95%CI: 0.86%-2.04%) and 1.71%(95%CI: 0.72%-2.71%) respectively; as for an increase of 10 ?g/m3 of NO2, the mortalities could be increased by 1.04%(95%CI: 0.72%-1.35%), 1.05%(95%CI: 0.59%-1.51%) and 1.43%(95%CI: 0.65%-2.21%) respectively. Conclusion The air SO2, NO2 of present levels in Shanghai have an adverse effect on the daily mortality of residents.