Addressing Tobacco, E-Cigarette, and Cannabis Waste (TECW)

March 17, 2026 updated by: California State University, San Marcos

The Tobacco, E-Cigarette, and Cannabis Waste Randomized Controlled Trial

This study tests of effect of brief education and support about tobacco, e-cigarette, and cannabis waste (TECW) on knowledge, beliefs, behavior, and TECW on two college campuses.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

400

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Davis, California, United States, 95616
        • University of California, Davis
      • San Marcos, California, United States, 92096
        • California State University San Marcos

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 25 years (Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • student at University of California, Davis or California State University San Marcs
  • between the ages of 18 and 25
  • taking at least one class on the main campus
  • at least six months until graduation
  • have a smart phone with location services enabled for apps
  • regular access to a device with sufficient WiFi
  • private space for three remote visits on over the next six weeks and one visit in six months
  • willing to have camera on during remote visits

Exclusion Criteria:

  • None

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Education Only
Treatment as usual with brief videos and weblink
Behavioral: Education plus Support
Brief behavioral support for using TECW Tracker
Other Names:
  • Motivational Enhancement
Experimental: TECW+
Education plus motivational enhancement
Behavioral: Education plus Support
Brief behavioral support for using TECW Tracker
Other Names:
  • Motivational Enhancement

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Knowledge about TECW
Time Frame: 6 weeks
Percent correct on 12-item knowledge test based on Protect our Planet: The Earth is Not Disposable (California Youth Advocacy Network) and Environmental Impact of Cigarette Butts (Tobacco Free CA) videos. Higher scores reflect more accurate knowledge about TECW
6 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Perceived harmfulness of TECW
Time Frame: 6 weeks
Questions adapted from Epperson et al. (2021) and Hoek et al. (2020); score ranges from 1-5, higher scores reflect greater perceived harm
6 weeks
Belief that TEC manufacturers should be accountable for waste mitigation
Time Frame: 6 weeks
Questions adapted from Hoek et al. (2020); score ranges from 1-4, higher scores reflect stronger regulatory belief
6 weeks
Use of TECW Tracker
Time Frame: 6 weeks
Number of reports received in ArcGIS-based TECW Tracker program
6 weeks
Readiness to engage in regulatory behavior
Time Frame: 6 weeks
Questions adapted from Pulvers (2022); scores range from 1-5; higher scores reflect greater regulatory readiness
6 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

California State University, San Marcos

Collaborators

University of California, Davis

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 1, 2023

Primary Completion (Actual)

October 15, 2024

Study Completion (Estimated)

June 30, 2026

Study Registration Dates

First Submitted

February 10, 2023

First Submitted That Met QC Criteria

February 20, 2023

First Posted (Actual)

March 2, 2023

Study Record Updates

Last Update Posted (Actual)

March 19, 2026

Last Update Submitted That Met QC Criteria

March 17, 2026

Last Verified

May 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 1896205
  • T321R4972 (Other Grant/Funding Number: California Tobacco Related Disease Research Program)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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