The state’s efforts to keep juveniles out of adult court has reduced the number of young people who are incarcerated by more than 70 percent, according to a new report.

The Justice Policy Institute, of Washington, D.C., found that Connecticut’s juvenile court system has taken several important steps over the past 10 years to address lawbreakers under age 18. Those steps include using more community-based juvenile review boards (which hand out non-incarceration sanctions) and treatment-based diversion programs.