TABLE 4

Summary of Multivariable Logistic and Linear Regression Models for BLLs, Children Aged 1 to 5 Years, NHANES 1988–2004

VariableFinal Logistic Model (N = 4817) Odds Ratio (95% CI)aFinal Linear Modelb (N = 4817)
β (SE)P
Age
    1–2 y2.7 (1.8–3.9)0.21 (0.02)<.0001
    3–5 y1.00.0
Race/ethnicity
    Non-Hispanic black3.2 (2.1–4.8)0.38 (0.03)<.0001
    Mexican American1.0 (0.6–1.8)0.03 (0.04).45
    Non-Hispanic white1.00.0
PIR
    ≤1.32.8 (1.8–4.4)0.37 (0.03)<.0001
    >1.31.00.0
Year housing built risk of lead exposure)
    Low risk1.00.0
    Medium risk1.8 (1.0–3.1)0.15 (0.03)<.0001
    High risk5.9 (3.2–10.8)0.51 (0.05)<.0001
Survey
    NHANES III phase 1 (1988–1991)1.00.0
    NHANES III phase 2 (1991–1994)0.4 (0.2–0.7)−0.31 (0.05)<.0001
    NHANES 1999–20040.1 (0.1–0.2)−0.67 (0.05)<.0001
  • a Dependent variable in logistic model was children with BLLs ≥10 μg/dL.

  • b Dependent variable in linear models was natural log-transformed BLL; R2 of final model = 0.36.