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New program helps formerly homeless quit smoking at home

NCT ID NCT04855357

Disease control Sponsor: University of California, San Francisco Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested a voluntary program to help formerly homeless adults living in supportive housing make their homes smoke-free. Researchers provided one-on-one counseling to residents and trained staff to offer smoking cessation referrals. The trial involved 452 participants across 20 housing sites in the San Francisco Bay Area, aiming to reduce smoking and secondhand smoke exposure.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
behavioral intervention (counseling and staff training)
What this could lead to
If successful, this could help formerly homeless adults voluntarily adopt smoke-free homes, reducing smoking rates and secondhand smoke exposure in supportive housing.
What could go wrong
This is a completed trial, but results may not apply to all housing settings. The intervention relies on voluntary participation, so some residents may not adopt smoke-free homes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

452 people

The number who actually took part.

Started

Jan 2022

Finished

Mar 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Age 18 years or older 2. Ability to understand study procedures and to comply with them for the entire length of the study. 3. Ability of individual or legal guardian/representative to understand a written informed consent document, and the willingness to sign it. 4. Current smokers \[(smoked at least 100 cigarettes in lifetime, daily or non-daily smoking in the past 7 days and at least 5 cigarettes per day, verified by expired Carbon Monoxide (CO)\>= 8 parts per million (ppm) who smoke in their homes. 5. Expect to live in the PSH site for at least 12 months 6. English proficient. Exclusion Criteria: 1\. Contraindication to any study-related procedure or assessment.

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Conditions

The condition(s) this trial relates to.

Smoking Cessation

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Second hand tobacco smoke Smoking cessation

Contacts and locations

Locations

  • University of California, San Francisco

    San Francisco, California, 94143, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.