Family sequence ID number (DMPFSEQ)
Final sampling weight (WTPFQX6)
Race/ethnicity of child (DMARETHN)
Gender of child (HSSEX)
Number of persons in the household/dwelling (HSHSIZER)
Family income, unimputed (HFF19R)
Highest grade completed for family reference person (HFHEDUCR)
Age of mother at time of child’s birth, years (HYA2)
Did mother smoke while pregnant with child (HYA3)
Child’s birth weight in grams (HYA7S)
Poverty/income ratio, categorized