TABLE 8

Logistic Regression Models Testing Effects of Chlorpyrifos on the Odds of Behavioral Disorder at 36 Months, Adjusted for Race, Gender, Gestational Age, Maternal Education, Maternal IQ, ETS Exposure, and Home Environment (N = 228)

VariableOdds Ratio (95% CI)
Attention ProblemsADHD ProblemsPDD Problems
Prenatal exposures
    ETSa2.81 (0.44–17.77)8.10 (1.20–54.65)0.75 (0.17–3.41)
    Chlorpyrifosb11.26 (1.79–70.99)6.50 (1.09–38.69)5.39 (1.21–24.11)
Covariates
    Race/ethnicityc0.19 (0.02–1.61)0.26 (0.04–1.82)0.06 (0.01–0.65)
    Genderd2.84 (0.50–16.09)1.05 (0.23–4.74)2.40 (0.65–8.93)
    Gestational age0.62 (0.39–0.99)0.62 (0.40–0.97)0.81 (0.50–1.30)
    Maternal IQe0.99 (0.94–1.06)1.03 (0.97–1.09)1.00 (0.95–1.05)
    Maternal educationf0.22 (0.02–2.08)0.35 (0.06–2.10)1.75 (0.46–6.61)
    HOME score0.93 (0.80–1.08)0.88 (0.77–1.01)0.93 (0.82–1.05)
  • a Prenatally exposed = 1; not exposed = 0.

  • b High exposure (>6.17 pg/g) = 1; low exposure (≤6.17 pg/g) = 0.

  • c Black = 2; Dominican = 1.

  • d Male = 2; female = 1.

  • e Measured with the Test of Nonverbal Intelligence, Second Edition,42 natural logarithmically transformed.

  • f No high school degree = 1; high school degree = 0.