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CompletedNCT05751369TECWUpdated Oct 26, 2026

Addressing Tobacco, E-Cigarette, and Cannabis Waste

An interventional study of Education plus Support in Knowledge, Attitudes, Practice, sponsored by California State University, San Marcos. Completed at 2 sites in United States. Open to participants aged 18 Years to 25 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-10-26.

Sponsored by California State University, San Marcos · Not applicable, Interventional, and Prevention

Updated Oct 26, 2026Now CompletedPrimary completion moved+2 moreGo to Updates ↓
Phase
Not applicable
Study type
Interventional
Enrollment
406
Allocation
Randomized
Ages
18 Years to 25 Years
Sex
All
01

Study summary

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.

02

Conditions studied

  • Knowledge, Attitudes, Practice

Browse trials for

03

In context

Behavior

1,573 studies on the registry are indexed under Behavior; 313 are open to participants now.

This study's enrollment of 406 is above the median of 120 across 1,197 interventional studies indexed under Behavior.

Browse Behavior studies →

Lead sponsor

California State University, San Marcos is the lead sponsor of 9 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 25 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

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

Exclusion Criteria:

  • None
05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
406 participants (actual)

Study arms

  • Active comparator
    Education Only

    Treatment as usual with brief videos and weblink

    Behavioral: Education plus Support

  • Experimental
    TECW+

    Education plus motivational enhancement

    Behavioral: Education plus Support

Interventions

  • BehavioralEducation plus Support

    Brief behavioral support for using TECW Tracker

    Also known as: Motivational Enhancement

06

What researchers measure

Primary outcomes

  1. Knowledge about TECW

    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

    Time frame: 6 weeks

Secondary outcomes

  1. Perceived harmfulness of TECW

    Questions adapted from Epperson et al. (2021) and Hoek et al. (2020); score ranges from 1-5, higher scores reflect greater perceived harm

    Time frame: 6 weeks

  2. Belief that TEC manufacturers should be accountable for waste mitigation

    Questions adapted from Hoek et al. (2020); score ranges from 1-4, higher scores reflect stronger regulatory belief

    Time frame: 6 weeks

  3. Use of TECW Tracker

    Number of reports received in ArcGIS-based TECW Tracker program

    Time frame: 6 weeks

  4. Readiness to engage in regulatory behavior

    Questions adapted from Pulvers (2022); scores range from 1-5; higher scores reflect greater regulatory readiness

    Time frame: 6 weeks

07

Study locations

2 sites
  • University of California, Davis
    Davis, California 95616, United States
  • California State University San Marcos
    San Marcos, California 92096, United States
08

References and documents

Publications

  • Pulvers K, Nordskog AB, Shearer H, Smith C, Stewart SL, Novotny TE, Tong EK. Modifying Tobacco and Cannabis Waste Perceptions and Behavior Among Young Adults: Protocol for a Randomized Controlled Trial. JMIR Res Protoc. 2025 Dec 4;14:e79525. doi: 10.2196/79525. PubMed 41343823 ↗

Individual participant data

Plan to share: No

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedDate before it movedWhere the date was before it movedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Mar 2023 to primary completion in Nov 2024, 20 months.

Of 741 non-industry interventional studies with no phase under Behavior, half reached primary completion within 14 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 32. This study's 20 months is above that.

Counting every sponsor, half of 757 studies reached it within 13 months; a quarter within 5 and three quarters within 32.

Since we started tracking on Sep 25, 2026, the dates moved once, on Oct 26, 2026: primary completion Oct 2024 → Nov 2024 and completion Jun 2026 → Jun 2025.

Earlier changes are on the record history on ClinicalTrials.gov ↗

How these figures are worked out, and which studies are left out of them.

Registered
Feb 10, 2023
First posted
Mar 2, 2023
StartActual
Mar 1, 2023
Primary completionActual
Nov 26, 2024was Oct 2024
CompletionActual
Jun 19, 2025was Jun 2026
Last update
Oct 26, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Status
Active, not recruiting→Completed
changed Oct 26, 2026
Primary completion
Oct 15, 2024→Nov 26, 2024
Oct 26, 2026
Study completion
Jun 30, 2026→Jun 19, 2025 (actual)
Oct 26, 2026
Enrollment
400 (estimated)→406 (actual)
Oct 26, 2026
Show all 1 update
  1. Oct 26, 2026
    Active, not recruiting→Completed
    Primary completion Oct 15, 2024→Nov 26, 2024
    Study completion Jun 30, 2026→Jun 19, 2025 (now actual)
    Enrollment 400 (estimated)→406 (actual)
    + 1 other change: verification date

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT05751369
Lead sponsor
California State University, San Marcos
Collaborators
University of California, Davis
Responsible party
Sponsor
First posted
Mar 2, 2023
Start date
Mar 1, 2023
Primary completion
Nov 26, 2024
Completion
Jun 19, 2025
Last update
Oct 26, 2026

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.

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Discussion

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