Increasing Contingency Management Success in Smoking Cessation

Increasing Contingency Management Success Using Shaping

Incentives can be used to facilitate the acquisition of many healthy behaviors, such as smoking cessation. However, there is much room for improvement in the use of incentives. This study investigates how two aspects of providing incentives influence the effectiveness of using incentives to promote smoking cessation. One aspect is the criterion for providing incentives, e.g., whether to require smoking cessation before providing an incentive or to provide incentives following smoking reductions. The other aspect being investigated is whether it is best to use a fixed incentive amount or an amount that increases with continued cessation success.

Study Overview

• Status: Completed
• Conditions: Smoking
• Intervention / Treatment: Behavioral: Contingency Management

• Study Type: Interventional
• Enrollment (Actual): 328
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Texas
    • San Antonio, Texas, United States, 78229-3900
      • Smoking Cessation Laboratory, Department of Psychiatry, UTHSCSA, 7703 Floyd Curl Drive

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria: Daily Smokers smoking a pack or more of cigarettes a day who are able to report to the study site each work day for about 5 minutes for around 3 months. Subjects must also have a breath CO level indicative of smoking at this level, and most report smoking for at least two years. Subjects must intend on quitting smoking.

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Exclusion Criteria: Participation in another study by this group within the past year. Inability to give informed consent. Incapable of attendance each workday during the morning hours.

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Study Plan

How is the study designed?

Design Details

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

Number of Arms

6

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: 1; Shaping intervention for hard-to-treat smokers	Behavioral: Contingency Management; incentives are available for reduced smoking on each study visit which occur each weekday.
Active Comparator: 2; fixed criterion intervention for hard-to-treat smokers	Behavioral: Contingency Management; incentives are available for reduced smoking on each study visit which occur each weekday.
Other: 3; Non contingent incentives available to hard to treat smokers	Behavioral: Contingency Management; incentives are available for reduced smoking on each study visit which occur each weekday.
Experimental: 4; Ascending incentives values used in Smokers with Early Success	Behavioral: Contingency Management; incentives are available for reduced smoking on each study visit which occur each weekday.
Active Comparator: 5; fixed value incentives are used in Smokers with Early Success	Behavioral: Contingency Management; incentives are available for reduced smoking on each study visit which occur each weekday.
Other: 6; Non contingent incentives are available to Smokers with Early Success	Behavioral: Contingency Management; incentives are available for reduced smoking on each study visit which occur each weekday.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Breath Carbon Monoxide Levels Indicating Smoking Abstinence During the Study, i.e., the Number of Breath Samples With Carbon Monoxide (CO) Levels Less Than 3 Parts Per Million (Ppm)	daily for breath CO

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Average Number Cigarettes Reported Smoked Each Day in the Past Week Measured at Follow-up Six Months After Entry Into the Study	average number cigarettes reported smoked each day in the past week at follow up six months after study entry	past week at follow-up six months after study entry

Collaborators and Investigators

• Sponsor: The University of Texas Health Science Center at San Antonio
• Collaborators: National Institute on Drug Abuse (NIDA); National Institutes of Health (NIH)
• Investigators: Principal Investigator: Richard J Lamb, Ph.D., The University of Texas Health Science Center at San Antonio

Study record dates

Study Major Dates

• Study Start: June 1, 2005
• Primary Completion (Actual): June 1, 2010
• Study Completion (Actual): November 1, 2010

Study Registration Dates

• First Submitted: January 4, 2006
• First Submitted That Met QC Criteria: January 4, 2006
• First Posted (Estimate): January 9, 2006

Study Record Updates

• Last Update Posted (Estimate): June 21, 2012
• Last Update Submitted That Met QC Criteria: June 14, 2012
• Last Verified: June 1, 2012

More Information

Terms related to this study

• Other Study ID Numbers: 045-0013-195; R01DA013304 (U.S. NIH Grant/Contract)