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Study tests which smoking warnings work best for different readers

NCT ID NCT00684437

Knowledge-focused Sponsor: M.D. Anderson Cancer Center 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 This study
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 22, 2026 · Updated 2 times

Summary

This study looks at how smokers with different reading skills respond to various health messages about smoking risks. About 494 smokers will listen to and read messages that are either factual or emotional, and either highlight benefits of quitting or costs of not quitting. The goal is to see which message types increase smokers' intention to quit and improve their attitudes toward quitting.

What this could mean

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

What this could lead to
If successful, this could help design better smoking-cessation messages tailored to people with different literacy levels.
What could go wrong
This is an observational study with no treatment. Results may not directly help smokers quit, and the findings might not apply to all groups.

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

494 people

The number who actually took part.

Started

May 2008

Expected to finish

May 2028

An estimate. End dates often move.

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 to 70 years

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 to 70 years 2. current smoker with a history of at least 5 cigarettes/day for the last year 3. can speak, read, and write in English 4. home address and a functioning home telephone number Exclusion Criteria: 1. current use of nicotine replacement therapy or bupropion 2. current enrollment in a smoking cessation treatment program 3. expired CO\<10 ppm

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Conditions

The condition(s) this trial relates to.

Smoking

As listed by the trial registrant

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

Smoking

Contacts and locations

Locations

  • University of Texas MD Anderson Cancer Center

    Houston, Texas, 77030, United States

More trials for these conditions

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