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Management of children with slightly elevated blood lead levels
R D Kimbrough1, M LeVois, D R Webb
1Institute for Evaluating Health Risks, Washington, DC 20005.
Insights
Parental counseling effectively reduced children's blood lead levels. This intervention, targeting elevated lead exposure, showed significant decreases in blood lead concentrations in young children.
Area of Science:
- Environmental Health
- Pediatric Toxicology
- Public Health Interventions
Background:
- Lead exposure in children poses significant health risks, particularly in communities near historical industrial sites.
- Older housing stock, common in the study area, presented a high risk due to lead-based paint.
- Previous studies indicated higher blood lead levels in the US when environmental lead was more prevalent.
Purpose of the Study:
- To evaluate the efficacy of parental counseling in reducing blood lead levels (BLLs) in young children.
- To assess the impact of home visits and targeted education on children's BLLs.
Main Methods:
- A cohort of 490 children under 6 years old was studied near a defunct lead smelter.
- Blood lead levels were measured, with intervention focused on children with BLLs >= 0.48 mumol/L (10 micrograms/dL).
- Intervention involved home visits and counseling for parents of affected children.
Main Results:
- Children with initial BLLs >= 0.48 mumol/L showed a significant reduction from a mean of 0.72 mumol/L to 0.38 mumol/L at 4 months.
- A subset of 30 children maintained reduced BLLs, with a mean of 0.43 mumol/L at 1 year, slightly increased from the 4-month follow-up.
- The study community's BLLs were generally lower than those reported in earlier US studies.
Conclusions:
- Parental education and counseling are highly effective interventions for reducing children's blood lead levels.
- Further research in larger populations is recommended to confirm the widespread applicability of this intervention strategy.
Objective:
To determine whether counseling of parents reduced blood lead levels in their young children.
Participants And Methods:
A lead exposure study was conducted in the vicinity of a defunct lead smelter. A total of 827 volunteers including 490 children younger than 6 years participated in the study. The mean venous blood lead level in the 490 children was 0.33 mumol/L (6.9 micrograms/dL), with a range of 0.03 to 1.94 mumol/L (0.7 to 40.2 micrograms/dL). A total of 78 (16%) children had blood lead levels > or = 0.48 mumol/L (10 micrograms/dL). However, only 5 (1%) of the children had blood lead levels of > or = 1.21 mumol/L (25 micrograms/dL). The blood lead levels in this community were much lower than levels reported in earlier studies in many areas of the United States, when lead levels in air and in food were higher. Most houses in the study community were built before 1920 and had high lead paint levels. High levels of lead were also found in many house dust and soil samples. Intervention consisted of home visits and counseling of parents of children with blood lead levels of > or = 0.48 mumol/L (10 micrograms/dL).
Results:
In children with initial blood lead levels of > or = 0.48 mumol/L (10 micrograms/dL) the blood lead test was repeated 4 months later. The arithmetic mean blood lead level 4 months later showed a decrease from 0.72 mumol/L (15 micrograms/dL) to 0.38 mumol/L (7.8 micrograms/dL). An additional blood sample was taken 1 year after the first sample in a subset of 30 children. These children showed a mean blood lead level of 0.43 mumol/L (9 micrograms/dL) at the 1-year follow-up, whereas their mean blood lead level at the 4-month follow-up had been 0.38 mumol/L (8 micrograms/dL).
Conclusion:
Educating parents proved a very effective tool. Further studies are needed in larger populations to evaluate the effectiveness of this approach.