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Who to Test? A Retrospective Study of Lead Testing in High-Risk Children
Margot Hillyer1, Luz Adriana Matiz2, Laura Robbins-Milne2
1NewYork-Presbyterian/Columbia University Medical Center, New York, NY, USA.
Insights
Universal lead testing in pediatric patients identified few elevated levels, particularly in older children without developmental delays. Routine screening of high-risk groups showed limited effectiveness for early lead exposure detection.
Area of Science:
- Pediatric Health
- Environmental Health
- Toxicology
Background:
- Most pediatric patients meet high-risk criteria for lead exposure.
- Screening and testing for lead exposure have been inconsistently implemented.
Purpose of the Study:
- To evaluate the effectiveness of universal lead testing for children aged 1-5 years.
- To assess the utility of lead testing in an urban academic pediatric setting.
Main Methods:
- Retrospective chart review of pediatric patients undergoing lead testing from 2010-2015.
- Analysis of serum lead levels, patient demographics, and behavioral diagnoses.
Main Results:
- Reviewed 6597 serum lead levels from 3274 patients; 0.7% had elevated levels.
- Elevated lead levels were most frequently identified in children aged 1-2 years.
- Children with elevated lead levels first detected at age 3+ were more likely to have developmental delays.
Conclusions:
- Routine lead testing in high-risk pediatric patients has low specificity for identifying elevated lead levels.
- Lead testing is less effective in children over 3 years old without developmental delays.
Background:
Nearly all pediatric patients in our setting meet high-risk criteria for lead exposure based on screening recommendations and guidelines. Implementation of screening and testing has been inconsistent.
Objective:
To assess the utility and efficacy of performing universal lead testing between ages 1 and 5 at an urban academic pediatric practice.
Methods:
Retrospective review of patients with routine lead testing between 2010 and 2015. Key variables included demographics, serum lead level, and behavioral diagnoses.
Results:
A total of 6597 serum lead levels from 3274 patients were reviewed. Forty-seven samples (0.7%) from 24 patients (0.7%) were elevated. Of the 24 patients with elevated lead, 75% were identified at age 1 or 2. Sixty-seven percent of patients with first elevated lead level at age 3 or older had a diagnosis of developmental delay.
Conclusion:
Routine testing of high-risk patients yielded minimal specificity in identifying elevated lead levels, especially in patients older than 3 years and without developmental delay.
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