Table 2.
Third-trimester serum levels of organochlorines among women from the CPP, 1959–1965.
| Organochlorines | n | CV (%) | LOD (μg/L) | < LOD (%) | Selected percentiles (μg/L) | |||
|---|---|---|---|---|---|---|---|---|
| 25th | 50th | 75th | 95th | |||||
| β-HCH | 1,899 | 18.6 | 0.23 | 0.2 | 1.01 | 1.42 | 2.12 | 5.25 |
| p,p’-DDE | 1,833 | 19.2 | 0.61 | 0.0 | 16.93 | 24.59 | 36.35 | 69.63 |
| p,p’-DDT | 1,903 | 22.1 | 0.66 | 0.1 | 6.46 | 9.33 | 14.16 | 26.57 |
| Dieldrin | 1,807 | 19.9 | 0.23 | 1.1 | 0.60 | 0.81 | 1.09 | 1.81 |
| Heptachlor epoxide | 1,859 | 18.6 | 0.21 | 19.7 | 0.24 | 0.40 | 0.74 | 1.53 |
| HCB | 1,881 | 59.3 | 0.08 | 21.3 | 0.12 | 0.24 | 0.35 | 0.82 |
| trans-Nonachlor | 1,911 | 19.7 | 0.28 | 28.4 | 0.26 | 0.40 | 0.58 | 0.91 |
| Oxychlordane | 1,809 | 24.6 | 0.20 | 29.8 | 0.16 | 0.33 | 0.53 | 0.95 |
| Total PCBsa | 1,915 | 18.7 | 0.20–0.33 | 5.2–98.4 | 1.93 | 2.74 | 3.92 | 6.74 |
| CV, coefficient of variation. aCongener-specific LOD (μg/L): 74 and 203, 0.20; 105 and 194, 0.21; 170, 0.22; 180, 0.23; 118 and 138, 0.25; 28 and 52, 0.27; 153, 0.33. The proportion below LOD was, for 138, 5.2%; 153, 8.7%; 118, 10.2%; 74, 36.8%; 180, 49.5%; and for the other congeners, ≥ 76.8%. | ||||||||