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Introduction <p>Despite evidence of the impact on academic performance of cannabis use disorder (CUD) there is little information about what happens in those cases of dual diagnosis, when CUD occurs along with other mental health disorders (DD).</p> Methods <p>Participants in this study (<i>N</i> = 300) were recruited from patients seeking treatment for CUD at an adolescent addictive behaviors unit. A multivariate logistic regression analysis was conducted to evaluate the effects of DD on school impairment (listwise deletion strategy). The interaction between CUD and other mental health disorders was included, along with covariates such as age of onset, years elapsed from first use to problematic use, and sex.</p> Results <p>The presence of co-occurring internalizing and/or externalizing disorders among adolescents with CUD was associated with higher odds of school impairment (OR = 3.73; 95% CI: 1.06–13.12; <i>p</i> = .04). In the adjusted model, psychiatric comorbidity was also associated with approximately twice the likelihood of repeating a grade or dropping out of school (OR = 2.05; 95% CI: 1.10–3.84; <i>p</i> = .03), whereas the CUD-only group, sex, age of initiation, and latency to regular cannabis use were not statistically significant predictors. These findings suggest that school impairment is particularly associated with the co-occurrence of CUD and other mental health disorders.</p> Conclusions <p>DD in adolescents emerges as a risk factor for academic performance. It is crucial to develop early intervention policies and approaches that comprehensively address DD.</p>

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Adolescent with cannabis use disorder and other mental health disorders: does dual disorder worsen school impairment?

  • 期刊论文

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  • 发表日期：

    2026年5月26日

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  • J. L. Matali,
  • E. Flores,
  • X. Estrada-Prat,
  • A. Bonillo

摘要

Introduction

Despite evidence of the impact on academic performance of cannabis use disorder (CUD) there is little information about what happens in those cases of dual diagnosis, when CUD occurs along with other mental health disorders (DD).

Methods

Participants in this study (N = 300) were recruited from patients seeking treatment for CUD at an adolescent addictive behaviors unit. A multivariate logistic regression analysis was conducted to evaluate the effects of DD on school impairment (listwise deletion strategy). The interaction between CUD and other mental health disorders was included, along with covariates such as age of onset, years elapsed from first use to problematic use, and sex.

Results

The presence of co-occurring internalizing and/or externalizing disorders among adolescents with CUD was associated with higher odds of school impairment (OR = 3.73; 95% CI: 1.06–13.12; p = .04). In the adjusted model, psychiatric comorbidity was also associated with approximately twice the likelihood of repeating a grade or dropping out of school (OR = 2.05; 95% CI: 1.10–3.84; p = .03), whereas the CUD-only group, sex, age of initiation, and latency to regular cannabis use were not statistically significant predictors. These findings suggest that school impairment is particularly associated with the co-occurrence of CUD and other mental health disorders.

Conclusions

DD in adolescents emerges as a risk factor for academic performance. It is crucial to develop early intervention policies and approaches that comprehensively address DD.