What topics does this cannabis study cover?

This study covers research on: Addiction, Mental Health.

Where was this research published?

Published in Substance use & misuse on September 8, 2026.

Youth legal-system contact tied to longer adult substance use

Q: What did this research study find?

In this *nationally representative longitudinal cohort*, criminal legal system involvement before age 18 was associated with **higher odds of illicit drug use** from ages 18–28.

Examining Adulthood Trends in Substance Use After Youth Criminal Legal System Involvement.

Substance use & misuse • September 8, 2026 • Moderately Relevant

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AI Summary

This observational longitudinal study asked whether involvement in the criminal legal system before age 18 was associated with substance use between ages 18 and 28, and whether associations differed by severity of involvement. Researchers analyzed data from 8,961 participants in the nationally representative National Longitudinal Survey of Youth 1997, using statistical models to track alcohol, cigarette, marijuana, and illicit drug use over time.

The clearest association involved illicit drug use. Compared with youth without the specified involvement, those arrested, held in a juvenile facility, or held in an adult facility before age 18 had higher odds of illicit drug use during young adulthood, with reported odds ratios of 2.080, 2.132, and 2.598, respectively. Growth-curve models also suggested that earlier legal-system involvement was associated with more persistent substance-use patterns. The study reports associations, not proof that legal-system involvement caused later drug use; this abstract-based summary cannot determine the effects of cannabis specifically or the effectiveness of the suggested treatments.

💡 Key Findings

In this nationally representative longitudinal cohort, criminal legal system involvement before age 18 was associated with higher odds of illicit drug use from ages 18–28.

High

80%

The reported odds of illicit drug use were 2.080 after arrest, 2.132 after juvenile-facility incarceration, and 2.598 after adult-facility incarceration before age 18.

High

80%

Growth-curve models suggested that youth criminal legal system involvement was associated with more persistent substance use during adulthood.

Good

70%

Because this was an observational study, the findings show association rather than causation; the abstract does not establish that legal-system involvement directly caused later substance use or that any treatment would be effective.

High

90%

📄 Original Abstract

OBJECTIVES: Adolescent involvement in the criminal legal system (CLS) may function as a significant stressor with long-term behavioral health consequences. This study examined whether CLS involvement before age 18 influences the odds and trajectories of substance use (alcohol, cigarette, marijuana, and illicit drug use) from ages 18-28, and whether these effects vary by severity of involvement. METHOD: Data were drawn from the 1997-2011 surveys of the National Longitudinal Survey of Youth 1997 (N = 8,961; approximately 50% male), a nationally representative cohort. Random intercept and growth curve models were estimated to examine the effects of CLS involvement before 18 on the odds of substance use from 18-28 (alcohol, cigarette, marijuana, and illicit drug use). RESULTS: Being arrested, incarcerated in a juvenile facility, or incarcerated in an adult facility before 18 was associated with an increased odds illicit drug use (OR = 2.080, p < 0.001; OR = 2.132, p < 0.001; OR = 2.598, p < 0.001) from 18-28 (respectively). The growth curve models suggested that CLS involvement before 18 could result in more persistent substance use. CONCLUSIONS: These findings suggest that youth CLS involvement could influence substance use and more persistent patterns of substance use in adulthood. The combination of cognitive behavioral therapy and substance use treatment should be considered for reentering youth. Criminal legal system involvement before age 18 is associated with increased and prolonged substance use during adulthood – especially illicit drug use. Existing substance use treatment should be evaluated and additional interventions should be developed to help these youth/young people reenter society and address the collateral behavioral health consequences of being arrested or incarcerated before 18.