The RCT was designed to evaluate the
efficacy of family intervention among
children at very high risk for behavior
problems.36 The trial enrolled 99 younger
siblings of adjudicated youth (48%
of eligible) in 5 cohorts from 1997 to
2001; after enrollment of each cohort,
families were randomized to intervention
(an adapted version of the Incredible
Years Series; 22 2-hour parent
and child groups30,37) and to a nointervention
control condition. Children
were followed prospectively over a 6-
year period, from ages 4 to 10 years.
During the trial, children were assessed
4 times, every 8 months; during the
follow-up phase, children were evaluated
4 times, every 12 months, with the last
evaluation occurring between 2003 and
2007. For the current follow-up study, the
health assessment was conducted in
2006 for all participants, an average of 5
years after intervention (ranging from 4
to 8 years for the last and first cohorts,
respectively). Families who had participated
in the trial were approached for
follow-up health assessments by telephone
and informed consent and assent
were obtained at the assessment. The
follow-up study was approved by the
University Institutional Review Board.
Although we attempted to evaluate boys
and girls at the follow-up health assessment,
there was an underrepresentation
of boys fromthe control condition,
with none from the earlier cohorts. This
resulted in narrow overlap in the distributions
of age (intervention: range
= 9.58–13.25, mean = 11.02, SD = 1.24;
e622 BROTMAN et al
Downloaded from
The RCT was designed to evaluate the
efficacy of family intervention among
children at very high risk for behavior
problems.36 The trial enrolled 99 younger
siblings of adjudicated youth (48%
of eligible) in 5 cohorts from 1997 to
2001; after enrollment of each cohort,
families were randomized to intervention
(an adapted version of the Incredible
Years Series; 22 2-hour parent
and child groups30,37) and to a nointervention
control condition. Children
were followed prospectively over a 6-
year period, from ages 4 to 10 years.
During the trial, children were assessed
4 times, every 8 months; during the
follow-up phase, children were evaluated
4 times, every 12 months, with the last
evaluation occurring between 2003 and
2007. For the current follow-up study, the
health assessment was conducted in
2006 for all participants, an average of 5
years after intervention (ranging from 4
to 8 years for the last and first cohorts,
respectively). Families who had participated
in the trial were approached for
follow-up health assessments by telephone
and informed consent and assent
were obtained at the assessment. The
follow-up study was approved by the
University Institutional Review Board.
Although we attempted to evaluate boys
and girls at the follow-up health assessment,
there was an underrepresentation
of boys fromthe control condition,
with none from the earlier cohorts. This
resulted in narrow overlap in the distributions
of age (intervention: range
= 9.58–13.25, mean = 11.02, SD = 1.24;
e622 BROTMAN et al
Downloaded from
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