Table 1.
Lipid-adjusted concentrations (ng/g lipid) of organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers in serum samples collected from 48 mothers participating in the California Childhood Leukemia Study (2006–2007).
| Chemical | Detection Frequency |
Method Detection Limit (MDL) |
Percentiles of Serum Concentrations |
Geometric Mean |
|||
|---|---|---|---|---|---|---|---|
| 25th | 50th | 75th | 90th | ||||
| Organochlorine pesticides | |||||||
| β-BHC | 69% | 1.6 | <MDL | 5.9 | 10 | 29 | 5.7 |
| o,p'-DDT | 69% | 1.9 | <MDL | 5.3 | 7.1 | 8.2 | 3.7 |
| p,p'-DDT | 88% | 1.6 | 3.3 | 4.1 | 6.3 | 9.0 | 4.3 |
| p,p'-DDE | 100% | 4.3 | 120 | 180 | 290 | 420 | 190 |
| HCB | 100% | 1.6 | 6.8 | 7.8 | 8.5 | 10 | 7.7 |
| trans-Nonachlor | 100% | 1.7 | 6.7 | 8.8 | 11 | 15 | 8.8 |
| Oxychlordane | 98% | 1.6 | 3.9 | 5.0 | 5.8 | 7.1 | 4.6 |
| Polychlorinated biphenyls (PCBs) | |||||||
| PCB-28 | 100% | 1.6 | 3.1 | 3.6 | 4.3 | 6.8 | 4.1 |
| PCB-66 | 85% | 1.6 | 1.7 | 2.3 | 2.9 | 3.4 | 2.2 |
| PCB-74 | 98% | 1.6 | 2.4 | 3.2 | 3.8 | 4.2 | 3.0 |
| PCB-99 | 90% | 1.6 | 2.2 | 3.0 | 3.5 | 4.3 | 2.7 |
| PCB-101 | 65% | 1.6 | <MDL | 1.8 | 2.3 | 2.9 | 1.7 |
| PCB-105 | 73% | 1.6 | <MDL | 2.0 | 2.5 | 2.7 | 1.9 |
| PCB-118 | 100% | 1.7 | 3.2 | 4.0 | 5.4 | 6.7 | 4.0 |
| PCB-138 | 100% | 1.6 | 4.8 | 6.4 | 9.4 | 14 | 6.8 |
| PCB-153 | 100% | 1.6 | 6.5 | 9.7 | 17 | 28 | 11 |
| PCB-156 | 94% | 1.6 | 1.9 | 2.5 | 3.4 | 4.1 | 2.6 |
| PCB-167 | 60% | 1.6 | <MDL | 1.6 | 2.1 | 2.3 | 1.6 |
| PCB-170 | 100% | 1.6 | 3.2 | 4.4 | 6.6 | 9.9 | 4.6 |
| PCB-180 | 100% | 1.6 | 6.1 | 9.3 | 15 | 25 | 10 |
| PCB-183 | 81% | 1.8 | 1.6 | 2.4 | 2.8 | 3.3 | 2.2 |
| PCB-187 | 100% | 1.6 | 2.5 | 3.4 | 4.6 | 7.2 | 3.5 |
| PCB-194 | 100% | 1.6 | 2.3 | 3.2 | 4.2 | 5.4 | 3.1 |
| PCB-203 | 100% | 1.6 | 2.2 | 3.1 | 4.0 | 5.3 | 3.0 |
| Polybrominated diphenyl ethers (PBDEs) | |||||||
| BDE-47 | 98% | 12 | 23 | 35 | 68 | 110 | 43 |
| BDE-99 | 100% | 2.9 | 6.5 | 10 | 13 | 25 | 11 |
| BDE-100 | 100% | 2.4 | 8.0 | 10 | 15 | 22 | 12 |
| BDE-153 | 96% | 2.4 | 5.0 | 8.9 | 16 | 46 | 10 |
| BDE-154 | 48% | 2.4 | <MDL | <MDL | 3.6 | 5.7 | 2.7 |