Similar to the ACE Study
analyses, for each outcome variable, a binary
logistic regression was
applied to test the relationship of the adversity index score (0, 1, 2, 3, or ≥ 4) to the outcome, after entering the control variables (child's sex, child's race / ethnicity, caregiver's marital status, and family income).
Logistic regressions were used to predict the likelihood of recovery at 18 months, and mixed - effects
regression analysis was
applied to examine the association of severity and rates of improvement across time in the two treatment groups.