Internet Stop Smoking Study - Phase VI (TC4)

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
University of California, San Francisco Identifier:
First received: July 22, 2008
Last updated: April 11, 2014
Last verified: April 2014

The purpose of this study is to determine the percentage of English- and Spanish-speaking smokers worldwide who can stop smoking using an Internet stop smoking site.

Latinos and non-Latinos are welcome to participate.

We will stop recruitment on March 19, 2011. Participants will be able to use the site until May 19, 2011.

Condition Intervention
Behavioral: UCSF/SFGH Internet Stop Smoking Study site

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Internet Health Research Center: Smoking, Latinos, and the Web

Resource links provided by NLM:

Further study details as provided by University of California, San Francisco:

Primary Outcome Measures:
  • Smoking abstinence [ Time Frame: 1, 3, 6 and 12 month follow-ups ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Depression [ Time Frame: 1, 3, 6, and 12 month follow-ups ] [ Designated as safety issue: No ]

Estimated Enrollment: 110000
Study Start Date: September 2008
Estimated Study Completion Date: June 2015
Primary Completion Date: May 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: San Francisco Internet Stop Smoking Site

Internet Stop Smoking site (TC4) with several intervention elements from which the participants may choose as many as they wish

The links (URLs) to register for the study are:

English: Spanish:

Behavioral: UCSF/SFGH Internet Stop Smoking Study site
Internet stop smoking site in Spanish and English
Other Names:
  • The interventions being tested can be accessed online at:

Detailed Description:

This is Phase VI of a series of clinical trials comparing various Internet methods to help smokers quit via the Internet.

Our previous trials have involved randomized assignment. This trial is a participant preference trial, in which English- and Spanish-speaking smokers will be able to choose the elements of the site which they would like to use to stop smoking.

Smokers who find our link via search engines or listing on other Web sites may choose to enter the study.

Participants must be 18 years old to enter the study. Participants will be followed up at 1, 3, 6, and 12 months after entry into the study to determine whether they have stopped smoking. They will receive an email reminder with a link to our follow-up surveys. We will stop sending these email reminders on May 19, 2011, when the current Website will close.

Participation is totally voluntary. Participants are free not to provide data or to stop participating at any time.


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Adult (18 years old or above)
  • must have email
  • logging on to our stop smoking Internet site
  • providing consent to enter stop smoking study

Exclusion Criteria:

  • Younger than 18 years old
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00721786

United States, California
University of California, San Francisco SFGH Psychiatry
San Francisco, California, United States, 94110
Sponsors and Collaborators
University of California, San Francisco
Principal Investigator: Ricardo F. Muñoz, Ph.D. University of California, San Francisco
  More Information

Additional Information:
Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: University of California, San Francisco Identifier: NCT00721786     History of Changes
Other Study ID Numbers: IWHRC-RFM-SMK-PhVI, CHR H928-14936-14
Study First Received: July 22, 2008
Last Updated: April 11, 2014
Health Authority: United States: Institutional Review Board

Keywords provided by University of California, San Francisco:
Smoking cessation
Cigarette smoking
Tobacco smoking
Internet interventions
Spanish-speaking processed this record on March 25, 2015