Association between ambient air pollutants and preterm birth in Ningbo China: a time-series study

摘要

BackgroundExposure to air pollutants has been related to preterm birth, but little evidence can be available for PM2.5, O3 and CO in China. This study aimed to investigate the short-term effect of exposure to air pollutants on risk preterm birth during 2014–2016 in Ningbo, China.