The Relative Effectiveness of 10 Adolescent Substance Abuse Treatment Programs in the United States

Reports results of interviews of youths treated in 11 adolescent programs that had been identified as having suggestive evidence of effectiveness, to learn whether they had better outcomes than they would have had at other facilities.

A small number of cases were admitted to their respective treatment programs
less than 12 months prior to March 2002. Because these cases had no 12-month
assessments in the dataset, they were excluded by design. Since we assume in
this report that treatment effects are constant over the period of study, we can also
assume that the exclusion of these cases introduces no bias into our treatment
effect estimates. More problematic are those cases excluded because they were
lost ...