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There is limited evidence on the role of exposure to chemical constituents of fine particulate matter (PM) in risk for stillbirth. Thus, we conducted a case-control study in Harris County, Texas between 2008 and 2013, utilizing a 6:1 ratio of controls to individually matched cases. We linked birth and fetal death records with PM data from a single air monitoring station and estimated maternal exposures to metal constituents of PM over the risk period (defined by the gestational length of each case). We applied conditional logistic regression and modeled air pollutant exposures as continuous variables. We observed null associations for most metal constituents (Al, Cr, Cu, Fe, Pb, Mn, Ni, Se and Ti). However, we observed a modest increase in risk for stillbirth (adjusted odds ratio (OR) = 1.11, 95% confidence interval (CI): 1.02, 1.20) associated with a 0.007 μg/m interquartile range (IQR) increase in exposure to zinc (Zn) PM. This study adds to the scarce literature evaluating associations between PM metal constituents and stillbirth and points to the need for further research in this area.
This article was published in the following journal.
Name: Environmental research
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Hospitals controlled by the county government.
State bounded on the north by Colorado, on the east by Oklahoma and Texas, on the south by Texas and Mexico, and on the west by Arizona.
A photoelectric method of recording an X-ray image on a coated metal plate, using low-energy photon beams, long exposure time and dry chemical developers.
Fractures involving a GROWTH PLATE.
Reduction of high-risk choices and adoption of low-risk quantity and frequency alternatives.