Patterns of Substance Use Initiation among Young Adolescents in a Northern Plains American Indian Tribe

Abstract

Background: Substantial evidence documents problematic substance use in Northern Plains American Indian communities. Studies suggest that disparities can be traced to disproportionate rates of early substance use, but most evidence comes from the retrospective reports of adults or older adolescents. Objective: To use a prospective longitudinal design to examine substance use initiation patterns as they emerge among young American Indian adolescents. Methods: Four waves of data were collected across three consecutive school years from middle school students on a Northern Plains reservation (N = 450). Discrete-time survival analyses were used to estimate risks of initiation of cigarettes, alcohol, and marijuana from age 10 to 13. Results: Risk for cigarette initiation was relatively high at age 10 and stable until age 13. Marijuana risk was low at age 10 but increased sharply by age 12. Alcohol initiation lagged, not surpassing risk for cigarette initiation until age 13 and remaining below risk for marijuana initiation throughout middle school. Hazards for girls trended higher than those for boys across all substances, but differences did not reach significance. Conclusion: Initiation patterns among these American Indian adolescents differed from patterns reported in other US groups, particularly with respect to deviation from the sequence characterized the initiation of marijuana before alcohol that is predicted by the gateway theory. Scientific Significance: Findings suggest that prevention efforts with youth in this community should begin early with a primary focus on marijuana use. They also suggest the importance of examining sequences of substance initiation among youth in other American Indian communities.

• American Indian
• substance use initiation

ACKNOWLEDGMENTS

We thank the schools and the tribal community for their ongoing support and are grateful to the parents, guardians, and youth who gave so generously of their time. This project reflects the dedicated work of the project staff, led by Jennifer Desserich, Angela Sam, and Cindy Wheeler, without whom the extensive data collection necessary to this longitudinal project would not have been possible. We appreciate the guidance of the EAST Council, our community advisory board, for their insights into the interpretation of findings within the local context. Finally, we acknowledge the support of the National Institute on Drug Abuse (R01 DA027665); the National Institute of Mental Health (R01 MH069086); and the Bureau of Indian Education, Division of Performance and Accountability.

Declaration of Interest

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.