Figure 3.
Regression coefficients for associations of maternal 2nd trimester blood lead levels with SDQ scores in mid-childhood. Coefficients represent change in score for an IQR increase in maternal erythrocyte lead (0.6 μg/dL). Total Difficulties is calculated by summing the scales of emotional problems, conduct problems, hyperactivity, and peer relationship problems. Model 2: Adjusted for child age, sex and race/ethnicity; maternal 2nd trimester mercury and manganese levels, nulliparity, smoking during pregnancy, IQ, and education; paternal education; HOME composite score and household income.