Booking clients for addiction treatment: what works best?

Considerable effort has been devoted to trying to improve the nature and quality of drug abuse treatment over the past 30 years. While there is evidence that certain treatment modalities are more effective than others, there is little evidence that inpatient treatment is more effective than outpatient, that treatment of a long duration is more effective than that of a short duration or that intense treatment is more effective than less intense treatment. Attempts to match drug abusers to an optimal treatment type have largely been unsuccessful.