TABLE 1

Results of Manufacturer Lot Screening (2009–2016) for Multiple Devices Used in Blood Collection and BLLs (µg/dL) at the 97.5th Percentile in Children 1–5 y Old (NHANES 2009–2014)

NHANES, yLOD, µg/dLNo. Lots Tested for Blood MetalsNo. Lots FailedPercentage of Failures, %Geometric Mean, µg/dLBLL at 97.5th Percentile, µg/dL
2009–20100.311210.891.174.48
2011–20120.254924.080.973.83
2013–20140.071292922.50.762.80
2015–2016a0.07853035.3N/AN/A
  • N/A, blood lead results not available for NHANES 2015–2016. As the LOD decreases, the percentage of blood collection device lots (failures) increases, because of unacceptable metal contamination that could falsely elevate measurement results.

  • a From January 2015 to May 2016; not a completed NHANES cycle.