Contingency Management for Smoking Cessation

University of California San Francisco (UCSF)

Status: Completed

Conditions: Smoking Reduction; Smoking, Tobacco; Smoking Cessation

Treatments: Behavioral: Fixed payments; Behavioral: Contingency Management - Increasing

Study type: Interventional

Funder types: Other

Identifiers

NCT04982952

21632

NCI-2021-08359 (Registry Identifier)

Details and patient eligibility

About

The prevalence of smoking in the homeless population (70%) is over 4 times that of the general population (15%). Homeless adults have not experienced similar declines in tobacco use as the general population has over the past three decades. Homeless adults are interested in smoking cessation and make quit attempts, but are less successful in quitting smoking than the general population. Trials of group behavioral counseling and pharmacotherapy for smoking cessation have not led to substantial long-term abstinence (i.e., abstinence for 6 months or more), suggesting that these interventions alone are insufficient to improve quit rates among homeless adults. Many homeless adults seek health care in safety net clinics; these clinics could bring cessation interventions to scale. Contingency management is a powerful behavior change intervention that reinforces positive health behaviors through the provision of modest incentives (e.g., cash). In this pilot randomized controlled trial, the investigator will test the feasibility and acceptability of a contingency management intervention that provides incentives for smoking cessation for people experiencing homelessness.

Full description

In this pilot randomized controlled trial (RCT), the investigator will (1) adapt a known-efficacious extended CM cessation intervention to a novel population and setting, with the ultimate goal of increasing long-term abstinence among homeless adults seeking care in safety net health clinics, (2) develop a corresponding RCT protocol, and (3) conduct a pilot RCT to assess the feasibility and acceptability of the RCT. If the pilot RCT is feasible and acceptable, the investigator will test the adapted intervention in a subsequently-funded, full-scale RCT.

Primary Objectives:

Assess feasibility and acceptability of a CM intervention through:

1. Measuring biochemically-verified point prevalence abstinence at 6 months follow-up.
2. Measuring participant adherence to the protocol.
3. Gathering information on the number of visits attended.
4. Assessing the retention protocol.

Secondary Objectives

Assess feasibility and acceptability of a CM intervention through:

1. Biochemically-verified 7-day point months follow-up at 3 months.
2. Prolonged abstinence at 3 months and 6 months follow-up.
3. Point-prevalent abstinence at 12 months

Enrollment: 83 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

1. Are 18 years or older
2. Engaged in care at the Tom Waddell Urban Health Center (TWUHC)
3. Meet criteria for homelessness as defined by the Homeless Emergency Assistance and Rapid Transition to Housing Act
4. Are current smokers (smoked at least 100 cigarettes in lifetime, smoked daily in the past 7 days and at least 5 cigarettes per day, verified by expired Carbon Monoxide (CO) >= 8 parts per million (ppm))
5. Have an intention to quit smoking within the next six months
6. Are attending on-site smoking cessation counseling provided by the behavioral counselors
7. Are English proficient
8. Are able to provide informed consent. Patients who are interested in participating but not enrolled in counseling services will be encouraged to engage in counseling sessions at the time of enrollment.

Exclusion criteria

1. Are unable to take nicotine replacement therapy (e.g., pregnancy or myocardial infarction (MI) within the past 2 weeks)

Trial design

Primary purpose: Health Services Research

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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83 participants in 2 patient groups

Contingency Management (CM)

Experimental group

Description:

In addition to receiving usual cessation care at the Tom Waddell Urban Health Center (TWUHC), CM intervention participants with CO-verified abstinence will obtain a CM incentive payment, via gift cards and/or cash redeemable in national retail chains.

Treatment:

Behavioral: Contingency Management - Increasing

Control Group

Other group

Description:

Participants who choose to attend smoking cessation in the usual care setting at TWUHC will receive a basic $5 payment for attending each study visit.

Treatment:

Behavioral: Fixed payments