In each of the intervention communities, the ITS model tests whether there was a significant trend in arrest rates before and after the intervention was implemented, and if the pre- and post-trends are different.
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Effects of the Communities that Care (CTC) Prevention System on Youth Violence Outcomes in Two Violence-Impacted Denver Communities.
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The sentences
In the years during the interventions, the arrest rates varied widely in Community B but, overall, followed a decreasing trend.