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Evaluating Oral Fluid as a Screening Tool for Lead Poisoning
Sher Lynn Gardner1, Robert J Geller2,3, Robyn Hannigan4
1Emory University School of Medicine, Pediatrics, Atlanta, GA, USA.
Journal of Analytical Toxicology
|September 15, 2016
Summary
Screening young children for lead poisoning using oral fluid is feasible and effective. This method has a 100% negative predictive value, reducing the need for blood samples in over half of cases.
Area of Science:
- Pediatric Health
- Toxicology
- Clinical Diagnostics
Background:
- Lead poisoning screening is crucial for young children.
- Current blood lead testing methods can be difficult and unpleasant for children.
- Alternative, less invasive screening methods are needed to improve screening rates.
Purpose of the Study:
- To assess the correlation between oral fluid and blood lead levels in a clinical setting.
- To determine the acceptability and feasibility of collecting oral fluid samples from young children.
- To evaluate oral fluid as a viable alternative for lead screening.
Main Methods:
- Oral fluid samples were collected from 431 children (6 months to 5 years) undergoing blood lead testing.
- Blood lead levels were measured concurrently for comparison.
- Statistical analyses included Pearson correlations, linear regression, ANOVA, and Bland-Altman analysis.
Main Results:
- A 100% negative predictive value was observed for oral fluid lead screening.
- Oral fluid screening eliminated the need for blood samples in over 50% of children.
- No cases of elevated blood lead were missed by the oral fluid screening method.
Conclusions:
- Oral fluid screening for lead poisoning is a feasible and accurate alternative to blood testing.
- This method significantly improves patient comfort and potentially increases screening participation.
- Oral fluid testing offers a highly reliable way to rule out elevated lead levels.
