investigations. NSCAWII, like its predecessor NSCAWI, employed
a two-stage stratified sample design. The first stage selected
geographic areas containing a population served by a single child
welfare agency. These primary sampling units (PSUs), typically
counties, served as the basis from which a sample of childrenwas
drawn. NSCAW II used NSCAW I PSUs whenever possible.
Seventy-one of the 92 PSUs in NSCAWI were eligible and agreed
to participate in NSCAWII and 10 additional PSUs were added to
replace the PSUs not participating. This sample was constructed
to be representative of all children in theU.S.whowere subjects of
agencies’ investigations for alleged maltreatment during the
sampling period [15]. Data for these analyses come from the
baseline interviews completed between March 2008 and
September 2009. Because this study focuses on MH problems in
teens, analyses reported in this manuscript used data only for
children12 years of age at the time of the baseline interview (N¼
815) and their caregivers. All procedures for NSCAW II were
approved by the Research Triangle Institute’s Institutional Review
Board and all analytic work on the NSCAWII de-identified data by
the Rady Children’s Hospital Institutional Review Board.