Project CheckUP: A Brief Behavioral Intervention for Quitline Callers Who Use Marijuana (MJ) and Tobacco

Summary

Smoking cigarettes remains the number one preventable cause of death and disease in the US. Smokers who call tobacco quitlines and use marijuana struggle to quit tobacco due to the interactive effects of nicotine and marijuana. A recent study found that 25% of callers to state quitlines said they were using marijuana and 44% of those were interested in quitting or cutting back their marijuana use (in addition to wanting to quit smoking). The investigators propose to develop an integrated intervention for co-users of marijuana and tobacco to be delivered via state-funded quitlines. The investigators will incorporate key elements of an evidence-based brief behavioral intervention called 'The Marijuana Check-Up' into the tobacco quitline treatment. The investigators will evaluate the feasibility, acceptability and preliminary effects of the new intervention in a small randomized pilot study with 100 co-users recruited from four participating state quitlines. Outcomes measured at 3 months post randomization will include tobacco abstinence (biochemically verified) and days used marijuana. The investigators hypothesize that the intervention will: (1) be feasible to deliver (measured by coach treatment fidelity scores); (2) be acceptable to co-users (measured by enrollments into the study and call completion numbers); (3) increase tobacco cessation rates compared with standard quitline treatment; (4) increase co-users motivation to change MJ use; and (5) produce greater reduction in days using MJ compared with standard quitline treatment. The proposed brief behavioral intervention addressing co-use may increase quitline callers' chances of achieving and maintaining tobacco abstinence and increase participants' motivation to reduce marijuana use. As non-medicinal marijuana use becomes common and legal in more states, a low touch phone and web-based intervention for co-users of marijuana and tobacco could improve health outcomes for many. Findings will inform development of scalable public health intervention strategies for co-users easily implemented across quitlines.

Conditions

• Smoking Cessation
• Marijuana Use

Interventions

BEHAVIORAL

Behavioral: Quitline treatment as usual

TAU is state quitline treatment that may include coaching sessions, text messaging and access to the web-based program plus cessation medications and unlimited calls to the QL for support between sessions.

BEHAVIORAL

QL Marijuana Check-Up intervention (QL-MJCU)

QL Marijuana Check-Up intervention (QL-MJCU) was developed for non-treatment seeking MJ users and is based on Motivational Enhancement Therapy. Includes TAU (see standard quitline arm) with a trained coach plus a MJ assessment and Personalized Feedback Report (PFR).

Sponsors & Collaborators

• University of Washington

  collaborator OTHER

• SRI International

  collaborator INDUSTRY

• Consumer Wellness Solutions

  lead INDUSTRY

Principal Investigators

• Kelly M Carpenter, PhD · Consumer Wellness Solutions (Optum)

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Model

PARALLEL

Eligibility

Min Age

21 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2021-04-13

Primary Completion

2022-12-01

Completion

2022-12-01

Countries

• United States

Study Locations