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Multidimensional family therapy in adolescents with a cannabis use disorder: long-term effects on delinquency in a randomized controlled trial
ABSTRACT
Introduction
Substance use and delinquency are considered to be mutual risk factors. Previous studies have shown that multidimensional family therapy (MDFT) is effective in tackling both conditions on the short term. The current study examines the long-term effects of MDFT on criminal offending.
Method
109 adolescents with cannabis use disorder and comorbid problem behaviour were randomly assigned to either MDFT or cognitive behavioural therapy (CBT). Police arrest data were collected for six years: three years prior to and three years after treatment entry. Using survival analysis and repeated measure General Linear Models (rmGLM), the two treatment groups were compared on number of arrests, type of offence, and severity of offence. Moderator analyses looking at age, disruptive behaviour disorders, history of crimes, family functioning, and (severe) cannabis use were conducted (rmGLM).
Results
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Show moreABSTRACT
Introduction
Substance use and delinquency are considered to be mutual risk factors. Previous studies have shown that multidimensional family therapy (MDFT) is effective in tackling both conditions on the short term. The current study examines the long-term effects of MDFT on criminal offending.
Method
109 adolescents with cannabis use disorder and comorbid problem behaviour were randomly assigned to either MDFT or cognitive behavioural therapy (CBT). Police arrest data were collected for six years: three years prior to and three years after treatment entry. Using survival analysis and repeated measure General Linear Models (rmGLM), the two treatment groups were compared on number of arrests, type of offence, and severity of offence. Moderator analyses looking at age, disruptive behaviour disorders, history of crimes, family functioning, and (severe) cannabis use were conducted (rmGLM).
Results
While police arrest rates increased in the three years before treatment, the rates decreased substantially after the start of both treatments. No differences were found between the treatment groups with respect to either time to first offence from the start of the treatment or changes in frequency or severity of offending over time. A treatment effect trend favouring MDFT was found for property offending in the subgroup of adolescents with high baseline-severity of cannabis use.
Conclusions
Across a follow-up period of three years, MDFT and CBT were similarly effective in reducing delinquency
in adolescents with a cannabis use disorder.
Show less- All authors
- Pol, T.M. van der; Hendriks, V.; Rigter, H.; Cohn, M.D.; Doreleijers, T.A.H.; Domburgh, L. van; Vermeiren, R.R.J.M.
- Date
- 2018