The Community Youth
Development Study (CYDS)
A 24 community randomized controlled trial
to test the Communities That Care system.
Principal Investigator:
J. David Hawkins
Social Development Research Group
Funded by:
• National Institute on Drug Abuse
• National Institute on Alcohol Abuse and
Alcoholism
• Center for Substance Abuse Prevention
• National Cancer Institute
• National Institute on Child Health and
Development
• National Institute on Mental Health
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CTC Effects on Initiation of Problem
Behaviors
Grade 8 youth from CTC communities were:
33% less likely to start smoking cigarettes
32% less likely to start drinking
25% less likely to start engaging in
delinquent behavior
…than Grade 8 youth from control communities
in a panel followed from Grade 5.
2
CTC Effects on Current Involvement
in Problem Behaviors
Eighth grade youth in CTC communities:
23% less likely to drink alcohol currently
37% less likely to “binge” (5 or more drinks in a
row) in last two weeks.
Committed 31% fewer different delinquent acts
in past year
…than Grade 8 youth from control communities
in a panel followed from Grade 5.
Hawkins, J. David, Oesterle, Sabrina, Brown, Eric C., Arthur, Michael W., 2009, Archives of
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Pediatrics and Adolescent Medicine
Sustained Effects of CTC after
Five Years
Compared to control communities, 10th graders in the
panel from CTC communities showed:
• Less rapidly increasing risk since grade 5,
• Lower mean levels of targeted risk,
• Lower incidence of delinquent behavior,
alcohol use, and cigarette use,
• Lower prevalence of past-month cigarette use,
• Lower prevalence of past-year delinquency,
• Lower prevalence of past-year violence
than their 10th grade counterparts from control
communities.
Hawkins et al., 2012, Archives of Pediatrics and Adolescent Medicine
Investment in
Communities That Care Pays Off
$2004 Dollars
$5.30
$1.00
Investment
Today
Future Savings
Kuklinski, Briney, Hawkins & Catalano, 2012, Prevention Science
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