After imputation, SES was residualized by regressing SES on the other risk factors at age 5 that were significant predictors of SES, including positive parenting, single mother, divorce, and child to adult ratio, and saving the residuals. In separate models, residualized SES did not significantly predict the intercepts (B = −0.18, p = .145) or slopes (B = 0.01, p = .875) of externalizing problems. Then we examined the significant predictors of the intercepts and slopes collectively by forward selection.
