Abstract:
:Background Both elemental metals and particulate air pollution have been reported to influence adult blood pressure (BP). The aim of this study is to examine which elemental components of particle mass with diameter ≤2.5 μm (PM2.5) are responsible for previously reported associations between PM2.5 and neonatal BP. Methods and Results We studied 1131 mother-infant pairs in Project Viva, a Boston-area prebirth cohort. We measured systolic BP (SBP) and diastolic BP (DBP) at a mean age of 30 hours. We calculated average exposures during the 2 to 7 days before birth for the PM2.5 components-aluminum, arsenic, bromine, sulfur, copper, iron, zinc, nickel, vanadium, titanium, magnesium, potassium, silicon, sodium, chlorine, calcium, and lead-measured at the Harvard supersite. Adjusting for covariates and PM2.5, we applied regression models to examine associations between PM2.5 components and median SBP and DBP, and used variable selection methods to select which components were more strongly associated with each BP outcome. We found consistent results with higher nickel associated with significantly higher SBP and DBP, and higher zinc associated with lower SBP and DBP. For an interquartile range increase in the log Z score (1.4) of nickel, we found a 1.78 mm Hg (95% CI, 0.72-2.84) increase in SBP and a 1.30 (95% CI, 0.54-2.06) increase in DBP. Increased zinc (interquartile range log Z score 1.2) was associated with decreased SBP (-1.29 mm Hg; 95% CI, -2.09 to -0.50) and DBP (-0.85 mm Hg; 95% CI: -1.42 to -0.29). Conclusions Our findings suggest that prenatal exposures to particulate matter components, and particularly nickel, may increase newborn BP.
journal_name
J Am Heart Assocjournal_title
Journal of the American Heart Associationauthors
Zanobetti A,Coull BA,Luttmann-Gibson H,van Rossem L,Rifas-Shiman SL,Kloog I,Schwartz JD,Oken E,Bobb JF,Koutrakis P,Gold DRdoi
10.1161/JAHA.120.016935subject
Has Abstractpub_date
2021-01-05 00:00:00pages
e016935issue
1issn
2047-9980journal_volume
10pub_type
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