[Effect of air pollution on coronary heart disease mortality in Tianjin, 2001-2009: a time-series study].

OBJECTIVE

To quantitatively explore the effect of air pollution on coronary heart disease mortality in Tianjin.

METHODS

Mortality data in 2001 - 2009 were from Tianjin mortality surveillance system operated by the Tianjin Centers for Disease Control and Prevention while data related to meteorology and air pollution were from the Tianjin Meteorological Bureau and Tianjin Environmental Monitoring Station, respectively. Generalized Additive Model (GAM) extended Poisson regression was used to examine the relationship between air pollution and mortality in Tianjin, under the controlling of time trends, weather, the day of week and population etc.

RESULTS

The crude coronary heart disease mortality in Tianjin increased from year 2001 to 2009, from 105.12/100 000 to 167.03/100 000. The standardized mortality rate of 96.07/100 000 to 105.11/100 000. Air pollutants was more strongly associated with coronary heart disease mortality. By single GAM analysis, a 10 µg/m(3) increase in SO2, PM10 and NO2, which accounted for 1.25% (95%CI: 0.75% - 1.75%), 0.65% (95%CI: 0.51% - 0.79%) and 1.04% (95%CI: 0.52% - 1.55%) increased in daily mortality. By multiple GAM analysis, a 10 µg/m(3) increase in SO2 and PM10 which accounted for 0.86% (95%CI: 0.60% - 1.12%) and 0.40% (95%CI: 0.06% - 0.75%) increased the daily mortality. NO2 was not significantly associated with coronary heart disease mortality rates, but factors as low temperature, low wind speed and population size were (P < 0.05).

CONCLUSION

from this study showed that air pollution was a risk factor for coronary heart disease mortality in Tianjin.