Table 6.
Comparison of blood levels of chemicals associated with neurodevelopmental effects (Pb, Hg, OC pesticides, and PCB concentrations) between children in the Phillips neighborhood and children or adolescents in NHANES III.
| Geometric mean
|
Median
|
95th Percentile
|
||||
|---|---|---|---|---|---|---|
| Compound | Phillipsa | NHANESb | Phillips | NHANES | Phillips | NHANES |
| Pb (μg/dL)c | 3.08 | 2.2 | 2.90 | 2.2 | 16.0 | 7.0 |
| Hg (μg/L)c | 0.23 | 0.34 | 0.20 | 0.30 | 1.60 | 2.3 |
| Heptachlor epoxided | 0.02 | NA | 0.01 | NA | 0.04 | NA |
| Oxychlordaned | 0.02 | NA | 0.01 | NA | 0.15 | NA |
| β-HCCHd | 0.02 | NA | 0.01 | NA | 0.11 | 0.50 |
| p,p′-DDEd | 0.37 | 0.56 | 0.30 | 0.52 | 2.13 | 2.31 |
| trans-Nonachlord | 0.02 | NA | 0.01 | NA | 0.15 | 0.11 |
| PCB-74d | 0.03 | NA | 0.04 | NA | 0.20 | 0.18 |
| PCB-99d | 0.02 | NA | 0.01 | NA | 0.11 | 0.11 |
| PCB-105d | 0.01 | NA | 0.01 | NA | 0.03 | NA |
| PCB-118d | 0.02 | NA | 0.02 | NA | 0.09 | 0.26 |
| PCB-138d | 0.04e | NA | 0.03e | NA | 0.40e | 0.46 |
| PCB-146d | 0.01 | NA | 0.02 | NA | 0.04 | 0.08 |
| PCB-153d | 0.04 | NA | 0.03 | NA | 0.46 | 0.75 |
| PCB-156d | 0.01 | NA | 0.02 | NA | 0.05 | 0.11 |
| PCB-170d | 0.01 | NA | 0.02 | NA | 0.10 | 0.21 |
| PCB-180d | 0.02 | NA | 0.02 | NA | 0.22 | 0.54 |
| PCB-187d | 0.02 | NA | 0.02 | NA | 0.06 | 0.17 |
Abbreviations: < LOD, below limit of detection; NA, not applicable because geometric means were calculated only when ≥60% of samples were at or above the limit of detection, and percentile estimates were not reported below the highest limit of detection. All values in ng/g-serum, except as indicated.
Forty-three children from the Phillips neighborhood with at least one blood sample.
From the 1999–2000 NHANES sample (Needham et al. 2005b).
From children 1–5 years of age in NHANES.
From children 12–19 years of age in NHANES.
Concentration is for PCB-138–158.