Table 3.
Quartiles of air toxics and breast density (Breast Cancer Surveillance Consortium, 2011)
| Air toxics | Non-dense breasts | Dense breasts | Age-adjusted OR (95% CI) | Adjusted OR (95% CI)1 |
|---|---|---|---|---|
| Arsenic | ||||
| Quartile 1 | 31,220 | 26,086 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 32,046 | 20,194 | 0.76 (0.74, 0.78) | 0.79 (0.77, 0.81) |
| Quartile 3 | 27,568 | 26,764 | 1.16 (1.13, 1.19) | 1.25 (1.21, 1.28) |
| Quartile 4 | 31,640 | 27,063 | 1.05 (1.02, 1.07) | 1.20 (1.17, 1.23) |
| Cadmium | ||||
| Quartile 1 | 33,843 | 24,279 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 28,330 | 22,972 | 1.07 (1.05, 1.10) | 0.94 (0.92, 0.97) |
| Quartile 3 | 27,637 | 25,674 | 1.23 (1.20, 1.26) | 1.00 (0.98, 1.03) |
| Quartile 4 | 32,664 | 27,182 | 1.11 (1.08, 1.14) | 0.92 (0.90, 0.95) |
| Chromium | ||||
| Quartile 1 | 37,475 | 26,042 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 28,046 | 21,201 | 1.07 (1.04, 1.10) | 1.05 (1.02, 1.08) |
| Quartile 3 | 28,691 | 28,069 | 1.38 (1.35, 1.42) | 1.21 (1.18, 1.24) |
| Quartile 4 | 28,262 | 24,795 | 1.21 (1.18, 1.24) | 0.96 (0.93, 0.99) |
| Cobalt | ||||
| Quartile 1 | 36,555 | 20,137 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 26,648 | 22,128 | 1.43 (1.39, 1.46) | 1.18 (1.14, 1.21) |
| Quartile 3 | 28,415 | 27,756 | 1.73 (1.69, 1.77) | 1.44 (1.40, 1.48) |
| Quartile 4 | 30,856 | 30,086 | 1.76 (1.72, 1.80) | 1.60 (1.56, 1.64) |
| Lead | ||||
| Quartile 1 | 35,577 | 22,375 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 29,904 | 24,019 | 1.27 (1.24, 1.30) | 1.05 (1.03, 1.08) |
| Quartile 3 | 28,099 | 27,188 | 1.49 (1.46, 1.53) | 1.30 (1.26, 1.33) |
| Quartile 4 | 28,894 | 26,525 | 1.46 (1.42, 1.50) | 1.56 (1.52, 1.60) |
| Manganese | ||||
| Quartile 1 | 32,270 | 28,150 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 32,420 | 22,723 | 0.78 (0.77, 0.80) | 0.75 (0.73, 0.76) |
| Quartile 3 | 28,245 | 22,616 | 0.88 (0.86, 0.90) | 0.78 (0.76, 0.80) |
| Quartile 4 | 29,539 | 26,618 | 1.02 (1.00, 1.05) | 1.18 (1.15, 1.21) |
| Mercury | ||||
| Quartile 1 | 31,815 | 23,075 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 29,247 | 25,376 | 1.20 (1.17, 1.23) | 1.15 (1.12, 1.18) |
| Quartile 3 | 28,935 | 26,272 | 1.25 (1.22, 1.28) | 1.13 (1.10, 1.16) |
| Quartile 4 | 32,477 | 25,384 | 1.08 (1.06, 1.11) | 0.95 (0.92, 0.97) |
| Nickel | ||||
| Quartile 1 | 32,602 | 18,301 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 28,815 | 25,789 | 1.54 (1.50, 1.58) | 1.38 (1.34, 1.42) |
| Quartile 3 | 28,615 | 27,034 | 1.66 (1.62, 1.70) | 1.47 (1.43, 1.51) |
| Quartile 4 | 32,442 | 28,983 | 1.54 (1.51, 1.58) | 1.23 (1.20, 1.26) |
| Selenium | ||||
| Quartile 1 | 32,620 | 22,413 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 31,727 | 25,451 | 1.11 (1.09, 1.14) | 1.00 (0.97, 1.03) |
| Quartile 3 | 26,406 | 24,893 | 1.29 (1.26, 1.32) | 1.03 (1.00, 1.06) |
| Quartile 4 | 31,721 | 27,350 | 1.20 (1.17, 1.23) | 0.90 (0.88, 0.93) |
| PAHs | ||||
| Quartile 1 | 34,931 | 18,570 | 1.00 (reference) | 1.00 (reference) |
| Quartile 2 | 29,218 | 24,831 | 1.60 (1.56, 1.64) | 1.60 (1.56, 1.65) |
| Quartile 3 | 29,325 | 29,141 | 1.90 (1.85, 1.94) | 1.66 (1.62, 1.71) |
| Quartile 4 | 29,000 | 27,565 | 1.76 (1.72, 1.81) | 1.27 (1.23, 1.31) |
1Adjusted for age, race, menopausal status, zip code level income and education, and parity status