What topics does this cannabis study cover?

This study covers research on: Sleep, Addiction, Mental Health.

Where was this research published?

Published in Sleep medicine on June 20, 2026.

Sleep Addiction Mental Health

Poor sleep quality is the key driver of teen substance use patterns

Independent and joint associations of chronotype and sleep quality with psychoactive substance use in adolescents.

Sleep medicine • June 20, 2026 • Moderately Relevant

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AI Summary

This study examined how sleep patterns and natural sleep-wake preferences (chronotype) relate to substance use in 1,311 adolescents aged 11-19 years. Researchers found that most teens reported insufficient sleep (65% slept less than 8 hours per night) and poor sleep quality, which emerged as a consistent predictor of cannabis, alcohol, and tobacco use. Evening-type adolescents—those naturally inclined to stay up late—showed higher substance use rates, but when sleep quality was factored in, the importance of sleep quality substantially overshadowed chronotype differences.

The research revealed important school-schedule effects: morning-shift students slept significantly less than evening-shift students, and different combinations of chronotype and school schedules were associated with distinct substance-use patterns. While the formal statistical test for school-schedule interactions wasn't significant for individual substances, the combined analysis showed that misalignment between a teen's natural sleep timing and their school schedule created patterns of higher substance use. Sleep quality remained the most consistent protective factor across all substance categories, suggesting it's a more modifiable and impactful target than unchangeable traits like chronotype.

These findings carry practical implications for adolescent health policy: improving sleep hygiene and quality may be more effective for substance-use prevention than attempting to change inherent sleep preferences or forcing students into schedules misaligned with their biology. The study suggests that schools and parents should prioritize sleep health as a foundation for reducing adolescent cannabis and other substance use, rather than focusing solely on chronotype awareness.

📄 Original Abstract

To examine the associations of chronotype and sleep quality with psychoactive substance use among adolescents attending schools with different schedules and patterns associated with chronotype-school schedule combinations. A cross-sectional study was conducted in 1311 adolescents aged 11-19 years from public and private schools. Chronotype was assessed using the Children's Morningness-Eveningness Questionnaire, sleep quality using the Pittsburgh Sleep Quality Index, and psychoactive substance use through structured questionnaires. Logistic regression models examined the independent and joint associations of chronotype and sleep quality with psychoactive substance use. Formal Chronotype × School Schedule interactions were also tested. Most adolescents reported insufficient sleep (65 % slept <8 h/night) and regular or poor sleep quality (80 %). Morning-shift students reported shorter sleep duration than evening-shift students. In separate adjusted models, evening chronotype and poor sleep quality were associated with higher odds of alcohol, tobacco, and cannabis use. In fully adjusted models, sleep quality remained the most consistent predictor across substance categories, whereas chronotype associations were substantially attenuated. Formal Chronotype × School Schedule interactions were not statistically significant for alcohol, tobacco, or cannabis use. However, analyses using a combined chronotype-school schedule variable identified significant differences in alcohol, tobacco, and cannabis use patterns across chronotype-school schedule groups. Sleep quality showed the most consistent associations with psychoactive substance use across multiple substance categories. Although the school schedule did not significantly modify chronotype-related associations, chronotype-school schedule combinations were associated with distinct substance-use patterns. These findings highlight sleep health as a potential target for adolescent substance-use prevention.

Paper Type

📄 Research

Publication

Journal: Sleep medicine
Published: June 20, 2026
PMID: 42330815
DOI: 10.1016/j.sleep.2026.109095

Authors (3)

Rodolfo Espinoza-Abad Graduate Program in Health Sciences, Instituto de Ciencias de la Salud, Universidad Veracruzana, Mexico.
María Del Carmen Gogeascoechea-Trejo Instituto de Ciencias de la Salud, Departamento de Adicciones, Universidad Veracruzana, Mexico.
Fabio García-García Instituto de Ciencias de la Salud, Departamento de Biomedicina, Universidad Veracruzana, Mexico. Electronic address: fgarcia@uv.mx.