Table 4.
Adjusteda means (SEs) of CAL percentage of sites ≥ 4 mm or PD percentage of sites ≥ 4 mm by quartiles of PCDDs, PCDFs, dioxin-like PCBs, non–dioxin-like PCBs, and OC pesticides.
| Quintiles of POPsb |
||||||
|---|---|---|---|---|---|---|
| < 20th | 20th to < 40th | 40th to < 60th | 60th to < 80th | ≥ 80th | p-Trend | |
| CAL % of sites ≥ 4 mm | ||||||
| PCDDs | 7.0 (1.1) | 5.9 (1.1) | 7.4 (1.1) | 7.1 (1.1) | 8.5 (1.2) | 0.30 |
| PCDFs | 6.8 (1.1) | 6.7 (1.1) | 5.9 (1.1) | 8.8 (1.1) | 7.8 (1.1) | 0.27 |
| Dioxin-like PCBs | 6.0 (1.2) | 6.5 (1.1) | 6.5 (1.1) | 8.6 (1.1) | 8.4 (1.3) | 0.16 |
| Non–dioxin-like PCBs | 6.4 (1.2) | 5.3 (1.2) | 6.0 (1.1) | 8.3 (1.1) | 10.0 (1.3) | 0.06 |
| OC pesticides | 6.0 (1.3) | 4.7 (1.1) | 5.1 (1.1) | 9.0 (1.1) | 11.1 (1.3) | < 0.01 |
| PD % of sites ≥ 4 mm | ||||||
| PCDDs | 2.3 (0.8) | 2.7 (0.8) | 4.1 (0.8) | 3.8 (0.8) | 5.7 (0.8) | < 0.01 |
| PCDFs | 2.8 (0.8) | 3.7 (0.8) | 2.9 (0.8) | 5.8 (0.8) | 3.5 (0.8) | 0.16 |
| Dioxin-like PCBs | 2.2 (0.9) | 3.0 (0.8) | 5.0 (0.8) | 3.7 (0.8) | 4.7 (0.9) | 0.07 |
| Non–dioxin-like PCBs | 1.9 (0.9) | 3.7 (0.8) | 2.6 (0.8) | 4.5 (0.8) | 6.0 (0.9) | < 0.01 |
| OC pesticides | 1.1 (0.9) | 2.7 (0.8) | 4.1 (0.8) | 4.9 (0.8) | 5.9 (0.9) | < 0.01 |
a
Adjusted for age, sex, race, poverty income ratio, serum cotinine levels, cigarette smoking, and diabetes.
b
Detectable values of each POP were individually ranked and the rank orders of the individual POPs in each subclass were summed to arrive at the subclass value. All not detectable values were ranked as zero. The summary values were categorized by quintiles of the sum of ranks.