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Low-Cost Contingency Management for Smoking Cessation

NCT01040260 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 103

Last updated 2018-06-06

Study results available
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Summary

An innovative low-cost form of contingency management has been developed in which participants receive the chance to draw vouchers from a fish bowl depending on whether or not their abstinence from tobacco is confirmed by expired-air carbon monoxide. The vouchers can be redeemed for prizes of varying value. This form of contingency management has been shown to be effective in the treatment of a variety of substance use disorders, but has not been investigated in a clinical trial focusing on smoking cessation. Thus, the primary purpose of the proposed study will be to investigate the effects of a low-cost prize-based form of contingency management in the treatment of nicotine dependence. To accomplish this objective, we enrolled 103 current smokers into the study. The participants in Study Arm 1 received the contingency management intervention for 8 weeks, and the participants in Study Arm 2 had their smoking status assessed but did not receive the contingency management intervention. Both interventions received brief counseling and nicotine replacement therapy. The counseling was conducted in two 60-minute individual sessions scheduled one week apart with two follow-up phone calls at weeks 3, 4, and 6.

The primary outcome for this study was biochemically-validated smoking status at 3 months (end of treatment), and at 6- and 12-month follow-up. Both continuous and point-prevalent abstinence rates were determined. Saliva cotinine levels were measured in all participants reporting abstinence at each assessment. This study had 80% power to detect a 10% absolute difference in smoking cessation rates between the two treatment conditions (i.e., a 28% quit rate in Study Arm 1 versus a 18% quit rate in Study Arm 2) with alpha set at 0.05. These estimates included an anticipated 15% loss to follow-up over the 12-month study period.

Conditions

  • Tobacco Use Cessation

Interventions

OTHER

Counseling

Smoking cessation counseling

BEHAVIORAL

Contingency management

Use of tangible rewards for abstinence from smoking

DRUG

Nicotine patches

Nicotine patches

Sponsors & Collaborators

Principal Investigators

  • Timothy P Carmody, Ph.D. · University of California, San Francisco

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2009-06-30
Primary Completion
2012-05-31
Completion
2012-05-31

Countries

  • United States

Study Locations

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Entities

Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01040260 on ClinicalTrials.gov