ABSTRACT
Objective To assess the association of air pollution and preterm birth in Taiyuan.Methods The preterm birth data from November 2005 to January 2007 were from Taiyuan birth surveillance system,meteorological data and air pollution data were from Shanxi Meteorological Bureau and Taiyuan Environmental Monitoring Station respectively.The case-crossover analysis and conditional Logistic regression model were used to analyze the association of air pollution and preterm birth in Taiyuan,while the meteorological factors were controlled.Results The stronger effective period of PM10 was 5-day lag and 6-day lag,of SO2 was 7-day lag and 8-days moving average.When PM10,SO2 increased 50 ?g/m3,for PM10,the OR of a 5-day lag and a 6-day lag were 1.169(95%CI:1.058～1.292),1.235(95%CI:1.115～1.367)respectively,for SO2,the OR of a 7-day lag and a 8-days moving average were 1.346(95%CI:1.122～1.616),2.203(95%CI:1.517～3.201)respectively.In sensitivity analysis,the lagged effects of PM10 and the cumulative effects of SO2 were steady.Conclusion The air pollution in Taiyuan may produce an acute effect on preterm birth.