Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Effect of Preference × Time on the teacher-rated SDQ Hyperactivity/Inattention scale. Estimated marginal means adjusted for covariates are presented. Model included site, parent BSI 18 global severity, and parenting scores as time-varying covariates. SDQ = Strength and Difficulties Questionnaire (Goodman et al., 1998); BSI = Brief Symptom Inventory 18 (Derogatis, 2001).
