Trends in binge drinking, marijuana use, illicit drug use, and polysubstance use by sexual identity in the United States (2006–2017)

Abstract

Background: National studies often examine associations between sexual identity and substance use at a single point in time and neglect to examine whether these associations change over time. The present study examines U.S. trends in the past-year prevalence of binge drinking, marijuana use, illicit drug use, and polysubstance use across sexual identity subgroups (gay, lesbian, bisexual and heterosexual). Methods: The data come from four independent, cross-sectional samples measured by the National Survey of Family Growth (2006–2010, 2011–2013, 2013–2015, and 2015–2017). Based on the consistency in the sampling procedures used over time, merging the four data sets was possible. The target population is men and women 15–44 years of age. Results: Lesbian women had the sharpest decline in past-year binge drinking over time, followed by heterosexual women. The prevalence of binge drinking for bisexual women did not change significantly over time and was higher in 2015–2017 than for any sexual identity subgroup. In contrast, there were no significant differences in the prevalence of binge drinking among men by sexual identity subgroup. Past-year abstinence from substance use was consistently lower among lesbian women, gay men, and bisexual women relative to other sexual identity subgroups. Polysubstance use was consistently more prevalent among bisexual women (e.g., 32.3% in 2015–2017) as compared to other sexual identity subgroups. Conclusion: This is the first study to examine U.S. national trends in alcohol, marijuana, illicit drug, and polysubstance use across sexual identity subgroups, and demonstrates that sexual identity subgroup differences were robust with relatively few changes in trends over time. The consistently high rates of binge drinking and polysubstance use among bisexual women deserve much closer attention based on the related health consequences.

Keywords:

• Substance use
• sexual minorities
• epidemiology

Authors’ contributions

Drs. McCabe and West conceptualized and designed the study. Drs. McCabe and West drafted the initial manuscript. Drs. Kcomt and Evans-Polce reviewed and revised the manuscript. Mr. Engstrom and Dr. West conducted all statistical analyses. All authors approved the final manuscript as submitted and agree to be accountable for all aspects of the work.

Acknowledgments

The authors would like to thank Ms. Kathryn Lundquist, Mr. Mahmoud Abdulkarim, and Ms. Kate Leary for their assistance with preparing this manuscript for submission.

Additional information

Funding

Financial support for this research was provided by research grants [R01AA025684, R01CA203809, R01CA212517, R01DA031160, and R01DA036541] from the National Institute on Alcohol Abuse and Alcoholism, National Cancer Institute, and National Institute on Drug Abuse. The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute on Alcohol Abuse and Alcoholism, National Cancer Institute, National Institute on Drug Abuse, or the National Institutes of Health, or the U.S. Government.