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Opiate Treatment Index

Author/Developer / Address:

Darke S, Ward J, Hall W, Heather N, Wodak A (1991). The Opiate Treatment Index (OTI) Researcher’s Manual. National Drug and Alcohol Research Centre Technical Report Number 11. Sydney, National Drug and Alcohol Research Centre.

For questions regardingthe Lithuanian version of this instrument please contact Emilis Subata

For questions regardingtheCzech version of this instrument please contact Alena Trojackova

Publication dates:


Description / Type of Assessment:

The Opiate Treatment Index (OTI) is a structured interview designed to provide a measure of the effectiveness of drug treatments.

Domains measured / Life Areas / Problems Assessed:

The version ofOTI available here measures3 treatment outcomes; drug use, criminality and health status. The drug use questions allow the calculation of a quantity/frequency estimate (Q score), through the addition of consumption amounts on the two previous days and dividing this value by the time intervals between days.

Administration / Completion Time:

The OTI in its complete from takes 20-30 minutes to complete. Here,only selected components of the instrument are administered


English, Lithuanian and Czech



Page last updated: Wednesday, 23 May 2007