Tibia lead levels and methodological uncertainty in 12-year-old children

Area of Science:

• Environmental Health
• Pediatric Toxicology
• Biomedical Engineering

Background:

• In vivo bone lead measurements using 109Cd-based K-shell X-ray fluorescence (XRF) are established for assessing long-term lead exposure in adults.
• Lead exposure in children is a significant public health concern, necessitating accurate assessment methods.

Purpose of the Study:

• To assess tibia lead levels in children residing in a lead-exposed environment compared to a control group.
• To evaluate the methodological uncertainties of K-shell X-ray fluorescence (XRF) for bone lead measurement in children.
• To present models of factors influencing tibia lead levels in pediatric populations.

Main Methods:

• Utilized 109Cd-based K-shell X-ray fluorescence (XRF) for in vivo bone lead measurements.
• Recruited 210 children (11-12.5 years old) from a lead smelter town and a control town.
• Analyzed tibia lead levels and assessed methodological uncertainties.

Main Results:

• Tibia lead levels were measured in children from both the exposed and control towns.
• The methodological uncertainty associated with K-shell XRF tibia lead measurement in children was found to be comparable to that observed in adults.
• Factors influencing tibia lead levels were modeled.

Conclusions:

• 109Cd-based K-shell X-ray fluorescence (XRF) is a viable and accurate method for assessing bone lead in children.
• The precision of pediatric bone lead measurements using XRF is comparable to adult measurements.
• This technique can be instrumental in understanding and mitigating long-term lead exposure effects in children.