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Decreasing access to marijuana by alcohol-impaired customers

Decreasing access to marijuana by alcohol-impaired customers

Recreational marijuana markets appear to be contributing to morbidity and mortality due to polysubstance impaired driving and other harms by selling a social intoxicant (marijuana) to already intoxicated customers. Impairment increases when marijuana is combined with alcohol, making driving particularly risky and also contributing to other injuries and violence. In recreational marijuana markets, deterrence efforts to reduce impaired driving directed at drivers face challenges due to dispute over THC levels in per se laws and lack of valid field sobriety tests.

A team of researchers at Klein Buendel, the Pacific Institute for Research and Evaluation, and NORC at the University of Chicago, is launching a new 5-year research project to study an alternative prevention approach — decrease access to marijuana by alcohol-impaired customers. The goal of this study is to test the effectiveness of a policy and training intervention in the state-licensed recreational marijuana market in a Northwest State, where state law bans sales to apparently-intoxicated customers. It combines policy efforts by state regulators to increase deterrence of the state’s law and motivate store management to comply and training of store personnel in skills to recognize intoxication and refuse sales, using a responsible marijuana vendor online training developed by the research team.

Specific Aims

Aim 1: Conduct pseudo-intoxicated patron (PiP) assessments at state-licensed recreational marijuana stores in the state’s largest metropolitan area in Year 1.

Aim 2: Implement a policy and training (PT) intervention in Year 2 designed to increase compliance with the state law prohibiting sale of recreational marijuana products to apparently-intoxicated customers with a subsample of stores, assigned at random, that intends to: a) make owners/managers of recreational marijuana stores aware of the state’s law prohibiting sales of marijuana to apparently-intoxicated customers, b) increase their risk perception and motivation to comply with this law, and c) train store personnel in skills needed to recognize signs of intoxication in customers and refuse sales.

Aim 3: Compare PT intervention stores to usual and customary policy and training stores in a randomized controlled trial by posttesting state-licensed recreational marijuana stores in the large metro area with PiP assessments for refusal of sales in Year 3.

Aim 4: Estimate impact of the PT intervention on refusal to PiPs by implementing the PT intervention with the remaining stores in Year 3 in a partial cross-over design and assessing state-licensed stores with the PiP protocol in Year 4 and in Year 5.

The research is innovative and high impact by testing one of the first interventions to prevent recreational marijuana sales to apparently-intoxicated customers in one of the first states to ban such sales to reduce the risk of polysubstance impaired driving and other harms. The design allows for reproducibility by using a partial crossover. The PT intervention can be a model intervention to improve compliance with regulations on recreational marijuana sales in other states that have legalized recreational marijuana or that are considering legalization. 

The research is supported by a grant from the National Institute on Alcohol Abuse and Alcoholism (AA031591). Dr. W. Gill Woodall and Dr. David Buller from Klein Buendel are the Project’s Multiple Principal Investigators. Dr. Robert Saltz from the Pacific Institute for Research and Evaluation and Mr. James Fell from NORC are collaborating Co-Investigators.

Training Cannabis Store Personnel in Responsible Vendor Practices

Training Cannabis Store Personnel in Responsible Vendor Practices

Dr. W. Gill Woodall, Klein Buendel Senior Scientist, participated in a panel discussion at the 45th Annual Scientific Meeting of the Research Society on Alcoholism, June 25-29, in Orlando, Florida. He presented data and results from a recent study assessing and training cannabis store personnel in responsible vendor practices. In the wake of a great expansion of recreational cannabis, the prevention of harms related to polysubstance use has gathered attention as well. Specific and effective prevention strategies are needed. One potential approach borrows from alcohol prevention – responsible sales and service.

Regulations in all state recreational cannabis markets prohibit sales of marijuana products to customers under age 21 and in a few markets, sales to intoxicated customers. Using pseudo-patron methods, our team assessed sales to underage-appearing customers in recreational cannabis stores in Colorado and Washington State (175 stores) in 2016-17 and sales to apparently alcohol-intoxicated customers in stores in Colorado, Oregon, and Washington State (150 stores) in 2018.

Refusal of underage-appearing pseudo-patrons were very frequent (92.6%). By comparison, refusal of apparently alcohol-intoxicated pseudo-patrons was infrequent in all three states (11.0%), even though Oregon state law explicitly prohibited it. An online survey of personnel from 59 stores in 2020 explored frequency of sales to these customers. Respondents indicated that underage customers attempted to enter stores frequently (66.1% several/many times) and customers entered stores who were intoxicated by alcohol (40.7%) or marijuana (44.1%). They often refused sales to customers (57.6% several/many times for any reason; 42.4% for being intoxicated). Management support was high for checking IDs (91.5% supported it a lot) but moderate for refusing to sell to customers appearing intoxicated (74.6%).

An online responsible marijuana vendor training created by Dr. Woodall and his collaborators from Klein Buendel and the Prevention Research Center at the Pacific Institute for Research and Evaluation (PIRE) called “Train To Tend,” may have improved refusal to under-age customers at the entrances in stores that used it (trained stores: 65.9%, baseline, 82.5%, 3-month posttest, and 79.9%, 9-month posttest; untrained stores: 82.6%, 83.1%, 84.5% respectively), but did not seem to impact sales to intoxicated customers (intervention: 11.6%, control: 7.6%).

Deterrence due to state regulations or store policy for sales of cannabis products appears to be lower for sales to customers who appear intoxicated than underage customers in these cannabis markets. Training in responsible sales practices alone may not be successful when deterrence is low. Increasing deterrence may depend on regulators actively prioritizing the law to store licensees and monitoring compliance. Improve understanding of how regulatory policy and retail availability affect potential co-use of alcohol and cannabis in the legalized adult-use markets.

This research was funded by a grant from the National Institute on Drug Abuse at the National Institutes of Health (DA038933; Dr. David Buller, Principal Investigator). Dr. Woodall’s Co-Investigators include Dr. Robert Saltz from the Prevention Research Center at PIRE and Dr. David Buller from Klein Buendel.