New opiate and crack-cocaine users: characteristics and trends 2 
 
Contents 
Table of Contents 
 
Contents ............................................................................................................................................... 2 
Summary .............................................................................................................................................. 3 
1. Drug Interventions Programme Data ................................................................................................ 6 
2. Estimating an incidence trend from treatment data ........................................................................ 22 
Conclusion .......................................................................................................................................... 30 
Appendix ............................................................................................................................................ 31 
References .......................................................................................................................................... 44 
 
Disclaimer: ‘The views expressed in this report are those of the authors, not necessarily those 
of the Home Office (nor do they represent Government policy).’