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. Author manuscript; available in PMC: 2010 Feb 10.
Published in final edited form as: Biol Psychiatry. 2007 Sep 14;63(3):325. doi: 10.1016/j.biopsych.2007.07.013

Table 2.

Mean Blood Lead Level with Comparison to National Sample, 1999–2002

Sample Age (yrs) Mean Blood Lead μg/dL
National (CDC) 12–19 .94–1.10
Current (n = 115) 12–17 1.03 (SE = .05)
National (CDC) 6–11 1.25–1.51
Current (n = 35) 8–11 1.04 (SE = .09)

The National Centers for Disease Control (CDC) data (from the CDC National Health and Nutrition Examination Survey [NHANES] sample) reflect surveys at two points in time, one in 1999 and one in 2002. The lower value represents the 2002 value, and the higher value represents the 1999 value, indicating slight decrease over time in average population blood lead level.