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Relationship between blood lead and nutritional factors in preschool children: a cross-sectional study
S R Lucas1, M Sexton, P Langenberg
1University of Maryland School of Medicine, Department of Epidemiology and Preventive Medicine, USA.
Insights
Higher total caloric intake and dietary fat are linked to increased blood lead levels in preschoolers, even after controlling for other factors. This highlights nutrition
Area of Science:
- Pediatric Nutrition
- Environmental Health
- Toxicology
Background:
- Childhood lead exposure remains a significant public health concern.
- Nutritional factors may influence lead absorption and toxicity.
- Understanding these relationships is crucial for effective prevention strategies.
Purpose of the Study:
- To investigate the association between specific nutritional factors and blood lead levels (BLLs) in preschool children.
- To determine if dietary intake independently correlates with elevated BLLs.
Main Methods:
- Cross-sectional study of 296 preschool children (9-72 months).
- Assessment of nutritional status, socioeconomic factors, medical history, and lead exposure sources.
- Analysis of blood lead, serum iron (ferritin), free erythrocyte photoporphyrin, calcium, and hematocrit.
Main Results:
- Average blood lead level was 11.4 µg/dL.
- Total caloric intake showed a significant positive association with BLLs (P = .01).
- Dietary fat intake also demonstrated a significant positive association with BLLs (P = .05).
Conclusions:
- Total caloric intake and dietary fat are independently associated with higher blood lead levels in children.
- These nutritional factors may play a role in lead absorption or toxicity, irrespective of behavioral and environmental lead exposures.
- Findings suggest potential nutritional interventions to mitigate lead exposure risks.
Objective:
The purpose of this study was to assess the relationships between selected nutritional factors and blood lead levels of preschool children.
Methodology:
Data on 296 children, aged 9 to 72 months, who were cared for at the University of Maryland at Baltimore Pediatric Ambulatory Center were examined in this cross-sectional study. Nutritional status, socioeconomic aspects, medical history, and potential sources of lead exposure were assessed. Blood samples were evaluated for levels of blood lead, serum iron (ferritin), free erythrocyte photoporphyrin, calcium, and hematocrit.
Results:
The average blood lead level was 11.4 micrograms/dL. Multicollinearity of nutritional factors was addressed using regression techniques. After adjusting for confounders, significant positive associations with blood lead were found for total caloric intake (P = .01) and dietary fat (P = .05).
Conclusions:
The findings of this study suggest that even when behavioral and environmental exposures to lead were statistically controlled, total caloric intake and dietary fat each had an independent and significant association with the level of blood lead.