Table 2.
Association between LnBLL (μmol/L) and LnE2 (pg/mL) Stratified by race/ethnicity and sex.
| LnBLL (μmol/L) (Quartile) | LnE2 (pg/mL) | ||
|---|---|---|---|
| 8 to 11 years old | 12 to 15 years old | 16 to 19 years old | |
| Male | |||
| Q1 | Reference | Reference | Reference |
| Q2 | 0.0868 (0.0460, 0.1277) *** | 1.7147 (0.4118, 3.0176) * | 0.2173 (0.1510, 0.2837) *** |
| Q3 | 0.0430 (0.0037, 0.0823) * | 3.0914 (1.7980, 4.3847) *** | 0.1553 (0.0871, 0.2235) *** |
| Q4 | 0.1073 (0.0673, 0.1473) *** | 1.6038 (0.2687, 2.9388) * | 0.1560 (0.0906, 0.2215) *** |
| P for trend | <0.001 | 0.326 | 0.006 |
| Female | |||
| Q1 | Reference | Reference | Reference |
| Q2 | -0.0788 (-0.1760, 0.0183) | -3.3109 (-11.8286, 5.2069) | 0.0795 (-0.0585, 0.2175) |
| Q3 | -0.0756 (-0.1791, 0.0278) | -16.4467 (-27.4173, -5.4762) ** | -0.0019 (-0.1705, 0.1668) |
| Q4 | -0.0632 (-0.1739, 0.0476) | -3.1587 (-16.2987, 9.9813) | -0.1939 (-0.3980, 0.0102) |
| P for trend | 0.308 | 0.377 | 0.171 |
In this chart, age, ratio of family income to poverty; total energy, cholesterol, Ln(iron) and Ln(zinc) intake on the first day; fish eaten during the past 30 days, moderate recreational activities, body mass index, Ln(serum copper) were adjusted.
BLL, Blood lead levels; E2, Estradiol.
*P < 0.05, **P < 0.01, ***P < 0.001.