Related Experiment Videos
Relationship between blood lead and dietary iron intake in preschool children. A cross-sectional study
T A Hammad1, M Sexton, P Langenberg
1Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore 21201, USA.
Insights
Higher dietary iron intake is linked to lower blood lead levels in urban preschoolers. This study suggests improved nutrition may help reduce lead exposure risks in young children.
Area of Science:
- Environmental Health
- Pediatric Nutrition
- Toxicology
Background:
- Lead exposure is a significant public health concern for urban children.
- Iron deficiency is common in preschool-aged children and may influence lead absorption.
- Understanding nutritional factors affecting lead levels is crucial for prevention strategies.
Purpose of the Study:
- To investigate the association between dietary iron intake and blood lead levels in urban preschool children.
- To determine if iron status modifies the relationship between environmental lead exposure and blood lead concentration.
Main Methods:
- Cross-sectional study of 299 urban preschool children (9 months to 5 years).
- Data collection included nutritional status, socioeconomic factors, and lead exposure sources.
- Blood samples analyzed for lead, serum iron (ferritin), and other biomarkers.
Main Results:
- The average blood lead level was 11.4 (7.3) µg/dL.
- A statistically significant negative association (P=0.03) was observed between dietary iron intake and blood lead levels.
- This association remained significant after adjusting for relevant covariates.
Conclusions:
- Higher dietary iron intake is associated with lower blood lead levels in urban preschool children.
- Findings support the hypothesis that adequate iron nutrition may mitigate lead absorption.
- Dietary iron intake represents a potential modifiable factor in reducing lead burden in children.
Abstract:
The relationship between dietary iron intake and blood lead levels in urban preschool children was investigated in a cross-sectional study of 299 children from 9 months to 5 years old. Mothers of children attending the University of Maryland Pediatric Ambulatory Clinic volunteered for the children and themselves to join the study. The data collected included nutritional status, socioeconomic status, medical history, and potential sources of lead exposure. Blood samples from all participants were evaluated for levels of blood lead, serum iron (ferritin), free erythrocyte protoporphyrin, calcium, and hematocrit. The average blood lead level (standard deviation) in the studied population was 11.4 (7.3) micrograms/dL. With multiple linear and logistic regression analyses to adjust for covariates, a negative association (P = 0.03) between blood lead and dietary iron intake was found. This finding is consistent with similar results from experimental studies. It is concluded that there is evidence that higher dietary iron intake is associated with lower blood lead among urban preschool children in the studied population.