COMN Study

About the study

COMN Study Team
The COMN Study Team

The Effects of Cannabis Legalization and Persistent Use: A Longitudinal Study of Two Twin Cohorts (COMN) is a continuation of a previous grant to examine the long-term impact of Recreational Cannabis Legalization in approximately 4,500 participants from twin cohorts in Colorado and Minnesota. The current COMN project would collect the third post-RCL assessment in CO and the first since RCL began in MN. We will use these data to address whether years of RCL access affect cannabis use, alcohol use, mental health, and physical health. We also hope to determine whether health problems are associated with increased post-RCL cannabis use and identify individual differences in cannabis use and consequences.  

Study personnel

  • Principal Investigators: Scott Vrieze, PhD, Sylia Wilson, PhD
  • Study Coordinator: Tasha Walvig, PhD
  • Research Assistants: Brendon Lyons (Interviewer), Olivia Costa (Recruiter)