TABLE 3

Adjusted Coefficients (β) for Points on the Bayley PDI and MDI Scales for a 1-Log10 Unit Increase in Serum Levels of p,p′-DDT, o,p′-DDT, and p,p′-DDE

β (95% CI)
6 moa12 moa24 moa
PDI
    p,p′-DDT−1.73 (−3.36 to −0.10)b,c−2.33 (−4.44 to −0.22)c,d0.17 (−1.54 to 1.88)e
    o,p′-DDT−1.47 (−3.36 to 0.43)b−1.87 (−4.34 to 0.59)d−0.58 (−2.61 to 1.44)e
    p,p′-DDE−2.14 (−4.20 to −0.08)b,c−2.14 (−4.83 to 0.56)d0.59 (−1.58 to 2.77)e
MDI
    p,p′-DDT0.18 (−0.90 to 1.26)f−1.71 (−3.21 to −0.21)c,g−2.12 (−4.03 to −0.21)c,h
    o,p′-DDT0.18 (−1.06 to 1.42)f−2.56 (−4.28 to −0.84)g,i−3.06 (−5.30 to −0.83)h,i
    p,p′-DDE0.33 (−1.06 to 1.73)f−1.15 (−3.06 to 0.77)g−2.44 (−4.92 to 0.05)h,j
  • a Ages at assessments (mean ± SD) of 6.6 ± 1.0 months, 12.9 ± 1.5 months, and 24.6 ± 1.1 months.

  • b Controlling for psychometrician, gender, maternal years in the United States, poverty level, and season of assessment.

  • c P < .05.

  • d Controlling for psychometrician, maternal years in the United States, maternal age, housing density, child's age at assessment, and season of assessment.

  • e Controlling for psychometrician, gender, housing density, maternal education and marital status, maternal depression, child's age at assessment, location at assessment, and season of assessment.

  • f Controlling for psychometrician, gender, and housing density.

  • g Controlling for psychometrician, time breastfed, and maternal years in the United States.

  • h Controlling for psychometrician, time breastfed, gender, maternal education and age, HOME score, and maternal work status.

  • i P < .01.

  • j P < .10.