Significant reductions in substance abuse were generally found during and immediately following treatment. But most important, NTIES showed that clients served by Federally-funded substance abuse treatment programs were able to reduce their drug use by about 50 percent for as long as one year after leaving treatment.

Table 1 shows that:

NTIES Table of Contents | Introduction | Conclusions | Appendix | NTIES Findings on: Drug and Alcohol Use | Changes in Criminal Behavior | Employment, Income, and Homelessness | Changes in Physical and Mental Health | Changes in Sexual Behavior | Variation in Treatment Outcomes | Costs of Treatment