Lead Exposure and Blood Pressure in Pregnant Women
Author Information
Author(s): Ellen M. Wells, Ana Navas-Acien, Julie B. Herbstman, Benjamin J. Apelberg, Ellen K. Silbergeld, Kathleen L. Caldwell, Robert L. Jones, Rolf U. Halden, Frank R. Witter, Lynn R. Goldman
Primary Institution: George Washington University School of Public Health and Health Services
Hypothesis
What is the association between low-level lead exposure and blood pressure during late pregnancy?
Conclusion
Low-level lead exposure is significantly associated with increased maternal blood pressure during labor and delivery.
Supporting Evidence
- Lead exposure is linked to higher blood pressure during pregnancy.
- Women in the highest quartile of lead exposure had significantly higher blood pressure.
- Blood lead levels were measured using advanced mass spectrometry techniques.
- Adjustments were made for various confounding factors in the analysis.
- Lead exposure levels in this study were lower than in previous studies.
Takeaway
This study found that even small amounts of lead in pregnant women's blood can make their blood pressure go up.
Methodology
The study measured blood pressure and umbilical cord blood lead levels in 285 women during labor and delivery, adjusting for various confounding factors.
Potential Biases
Potential misclassification of lead exposure due to reliance on cord blood lead levels as a proxy for maternal exposure.
Limitations
Blood pressure was measured during labor, which may not reflect typical levels, and the study could not measure maternal blood lead levels directly.
Participant Demographics
Participants included 70.9% African Americans, 20.7% Caucasians, and 8.4% Asians, with a mean age of 26 years.
Statistical Information
P-Value
< 0.05
Confidence Interval
1.51–12.21 mmHg for SBP increase; 0.21–8.59 mmHg for DBP increase
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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