temporal variation in air pollution concentrations and preterm birth—a population based epidemiological study颞空气污染浓度的变化和早产出生人口为基础的流行病学研究.pdfVIP

Int. J. Environ. Res. Public Health 2012, 9, 272-285; doi:10.3390/ijerph9010272 OPEN ACCESS International Journal of Environmental Research and Public Health ISSN 1660-4601 /journal/ijerph Article Temporal Variation in Air Pollution Concentrations and Preterm Birth—A Population Based Epidemiological Study David Olsson 1,*, Magnus Ekström 2 and Bertil Forsberg 1 1 Division of Occupational and Environmental Medicine, Department of Public Health and Clinical Medicine, Umeå University, 901 87 Umeå, Sweden; E-Mail: bertil.forsberg@envmed.umu.se 2 Centre of Biostochastics, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden; E-Mail: magnus.ekstrom@slu.se * Author to whom correspondence should be addressed; E-Mail: david.olsson@envmed.umu.se; Tel.: +46-90-785-3479; Fax: +46-90-786-9995. Received: 16 December 2011; in revised form: 9 January 2012 / Accepted: 13 January 2012 / Published: 18 January 2012 Abstract: There is growing evidence of adverse birth outcomes due to exposure to air pollution during gestation. However, recent negative studies are also reported. The aim of this study was to assess the effect of ozone and vehicle exhaust exposure (NO ) on the 2 length of the