A community-based therapy helped Iranian teens with cannabis use disorder achieve abstinence and reduce distress | Research

The takeaway

The Adolescent Community Reinforcement Approach produced higher abstinence rates, fewer substance problems, and improved family relationships compared to treatment as usual in Iranian adolescents with cannabis use disorder.

Adolescent substance use treatment providers, global health researchers, and policymakers developing youth treatment programs in non-Western settings.

What the researchers found

Among 40 male adolescents with CUD, those receiving A-CRA (n=20) showed higher abstinence rates, reduced cannabis use frequency, decreased substance-related problems, lower psychological distress, improved health-promoting lifestyles, and better mother-adolescent relationships compared to treatment as usual, with effects maintained at three-month follow-up.

Why it matters

This is the first test of A-CRA outside Western contexts, demonstrating that an evidence-based adolescent cannabis treatment can be effective in a culturally distinct population with compounding socioeconomic vulnerabilities.

The numbers in context

40 participants (all male, aged 15-18, mean age 15.87). 20 per group. Assessments at pre-test, post-intervention, and 3-month follow-up. Improvements across abstinence, use frequency, substance problems, distress, and family relationships.

How the study worked

Randomized controlled trial of 40 male adolescents aged 15-18 diagnosed with CUD, recruited from child labor welfare educational centers in Tehran. Participants randomized to A-CRA or treatment as usual, assessed at baseline, post-intervention, and three-month follow-up.

What this study cannot tell us

Small sample (n=40) of only males from a specific vulnerable population (child labor centers). Purposive sampling limits generalizability. No biological verification of abstinence mentioned. Three-month follow-up is relatively short.

How to read the evidence

Randomized controlled design strengthens causal inference, but very small sample size and single-site recruitment from a specialized population limit generalizability.

When this study was published

2024 publication.

The bigger picture

Most adolescent cannabis treatment research comes from the US, Canada, and Europe. Successful adaptation in Iran, where cultural and socioeconomic contexts differ markedly, supports the cross-cultural robustness of behavioral reinforcement approaches for teen substance use.

Questions still open

Would A-CRA show similar effectiveness with female Iranian adolescents?
Can the improvements be sustained beyond three months without booster sessions?

Common questions

What is A-CRA?

The Adolescent Community Reinforcement Approach is a behavioral therapy that helps teens build skills, improve relationships, and find rewarding activities that compete with substance use. It involves individual sessions, caregiver training, and community engagement.

Why were these teens in child labor centers?

Participants were recruited from child labor welfare educational centers in Tehran, which serve adolescents in vulnerable socioeconomic circumstances. Cannabis use disorder in this population compounds existing disadvantages.

Read the original research

Effectiveness of the adolescent-community reinforcement approach for treating Cannabis use disorder in Iranian adolescents: A randomized controlled trial.

Acta psychologica, 251, 104604

View on PubMed ↗Publisher’s paper ↗

Citation

Mehr, Najmeh Khosrovan; Lavasani, Fahimeh Fathali; Noroozi, Alireza; Farahani, Hojjatollah; Gharraee, Banafsheh. (2024). Effectiveness of the adolescent-community reinforcement approach for treating Cannabis use disorder in Iranian adolescents: A randomized controlled trial.. Acta psychologica, 251, 104604. https://doi.org/10.1016/j.actpsy.2024.104604