Flow Diagram of the Communities and Participants in the Randomized Trial
CTC communities each identified locally specific elevated risk factors and low protective factors for adolescent problem behaviors in individual, peer, family, school, and community domains according to survey data from students in grade 6, 8, 10, and 12 in those communities. Although CTC was designed for children and youths ages 0 to 18 years, CYDS communities were asked to focus their prevention plans on programs for youths ages 10 to 14 years and their families and schools so that possible effects on drug use and delinquency could be observed within the initial 5-year study period. Starting with the 2004 to 2005 school year and annually thereafter, community coalitions implemented between 1 and 5 preventive programs to address their prioritized risk and protective factors. Overall, 18 different universal school-, family-, and community-based programs were implemented with high fidelity across the 12 intervention communities.