Table 6.
Adjusted associations of head circumference (cm) with OH-BDEs (nanograms per gram lipid) and TT3a (N = 56).
| OH-BDE controlled | 4′-OH-BDE-49
|
6′-OH-BDE-47
|
ΣOH-BDE
|
|---|---|---|---|
| Coef. (95% CI) | Coef. (95% CI) | Coef. (95% CI) | |
| Models with OH-BDE only | |||
| OH-BDE | −0.06 (−0.2, 0.09) | −0.08 (−0.23, 0.06) | −0.11 (−0.29, 0.07) |
| Models with OH-BDE and TT3 only | |||
| OH-BDE | −0.07 (−0.21, 0.07) | −0.08 (−0.23, 0.06) | −0.13 (−0.31, 0.05) |
| TT3 | −1.11 (−2.05, −0.17) | −1.03 (−1.94, −0.12) | −1.09 (−2.01, −0.18) |
| Models with OH-BDE, TT3, and their interaction | |||
| OH-BDE | −0.06 (−0.21, 0.09) | −0.09 (−0.23, 0.06) | −0.13 (−0.32, 0.06) |
| TT3 | −0.98 (−2.02, 0.06) | −1.08 (−2.03, −0.14) | −1.11 (−2.08, −0.15) |
| OH-BDE × TT3 | −0.18 (−0.63, 0.27) | 0.09 (−0.24, 0.41) | 0.04 (−0.44, 0.52) |
Abbreviations: Coef., coefficient; CI, confidence interval; TT3, total triiodothyronine.
a
Multiple linear regression models estimating the relationship between OH-BDEs, TT3, and head circumference controlled for non-Hispanic black race/ethnicity, maternal age, maternal educational attainment level, first birth, infant sex, and maternal smoking status. The logarithm base 2 was taken for TT3 and all OH-PBDEs. Log transformed OH-BDEs and TT3 were centered at their mean.