Table A2.

Mixed-effect regression model formulas to test the main effects and interactions between parental education, household income, and race on the whole-brain cortical surface area of American children.

Model 1

Whole-brain cortical surface area = Parental Education + Race + Sex + Married Family + Age + Hispanic

Model 2

Whole-brain cortical surface area = Household Income + Race + Sex + Married Family + Age + Hispanic

Model 3

Whole-brain cortical surface area = Household Income + Parental Education + Race + Sex + Married Family + Age + Hispanic + Parental Education x Race

Model 4

Whole-brain cortical surface area = Parental Education + Household Income + Race + Sex + Married Family + Age + Hispanic + Household Income x Race

All Models: Random: ~(Site/Family).