Lead Exposure and Folate Levels in U.S. Children
Author Information
Author(s): Hu Wenping, LeBlanc Tanya Telfair, Ruckart Perri Zeitz, Brooks-Griffin Quanza Shavonne, Allwood Paul
Primary Institution: National Center for Environmental Health, Centers for Disease Control and Prevention
Hypothesis
What is the impact of low blood lead levels on red blood cell folate concentrations in U.S. children aged 2–17 years?
Conclusion
Higher blood lead levels are associated with lower red blood cell folate concentrations in U.S. children.
Supporting Evidence
- Children in the second and third tertiles of blood lead levels had significantly lower red blood cell folate concentrations compared to those in the first tertile.
- The study included a total of 12,739 children with blood lead levels below 10 µg/dL.
- Subgroup analyses showed consistent negative associations across different age, gender, and racial groups.
Takeaway
This study found that kids with higher lead in their blood have lower levels of folate, which is important for their health.
Methodology
The study used data from NHANES over six cycles from 2007 to 2018, analyzing the relationship between blood lead levels and red blood cell folate concentrations using multivariate linear regression.
Potential Biases
Potential selection bias due to missing values in blood lead and folate concentrations.
Limitations
The study's cross-sectional design limits causal inferences, and there may be unmeasured confounding factors.
Participant Demographics
Children aged 2–17 years, with 51.1% male and 48.9% female, including various racial and ethnic backgrounds.
Statistical Information
P-Value
<0.001
Confidence Interval
95% CI: −0.1032, −0.0517
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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