Smoking Abstinence and Lapse Effects in Smokers With Schizophrenia and Controls (WREN)

April 26, 2012 updated by: Jennifer Tidey, Brown University
This project tests two hypotheses concerning the low smoking cessation rates in smokers with schizophrenia. The first hypothesis is that smokers with schizophrenia experience stronger and more sustained effects of smoking abstinence on negative mood and smoking urge than control smokers without psychiatric illness. The second hypothesis is that smokers with schizophrenia experience stronger reinforcing effects of a smoking lapse (i.e., more rewarding effects of smoking after a period of abstinence) than control smokers without psychiatric illness.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

In this study, smokers with schizophrenia and smokers without psychiatric illness participate in a nicotine preference task before and after a 3-day period of continuous smoking abstinence. The investigators will experimentally control abstinence by providing participants with high-value cash incentives contingent upon smoking abstinence verified with breath carbon monoxide levels. The investigators will measure nicotine withdrawal and smoking urge during the abstinence period. In the nicotine preference task, participants will make choices between nicotine-containing and denicotinized cigarette puffs to provide a measure of nicotine reinforcement, and the investigators will also measure the effects of smoking on mood. After the second nicotine preference task, participants will receive a small-value reinforcer if they continue to abstain for another day, and the investigators will measure time to the second lapse.

Study Type

Interventional

Enrollment (Actual)

60

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Rhode Island
      • Providence, Rhode Island, United States, 02912
        • Brown University, 121 South Main Street

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

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:

  • cigarette smokers, 20-50 cigarettes per day
  • schizophrenia or no psychiatric illness
  • age 18 or older
  • male or female

Exclusion Criteria:

  • unstable symptoms or medication
  • not interested in quitting smoking within 6 months

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: schizophrenia
Smokers with schizophrenia or schizoaffective disorder
Behavioral: smoking abstinence
3 days of biologically-confirmed smoking abstinence
Other: non-psychiatric
smokers without psychiatric illness
Behavioral: smoking abstinence
3 days of biologically-confirmed smoking abstinence

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Withdrawal symptoms
Time Frame: 3 days
negative mood related to nicotine withdrawal
3 days
urge to smoke
Time Frame: 3 days
craving for smoking
3 days
nicotine preference
Time Frame: before and after 3 days of abstinence
choice for nicotine puffs versus denicotinized cigarette puffs
before and after 3 days of abstinence
positive and negative mood
Time Frame: before and after 3 days of abstinence
positive and negative mood scale
before and after 3 days of abstinence

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
time to lapse
Time Frame: 192 hours
time between smoking behavior in the laboratory and first cigarette outside of the laboratory
192 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Brown University

Investigators

  • Principal Investigator: Jennifer Tidey, Ph.D., Brown University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2009

Primary Completion (Actual)

February 1, 2012

Study Completion (Actual)

February 1, 2012

Study Registration Dates

First Submitted

October 1, 2010

First Submitted That Met QC Criteria

October 1, 2010

First Posted (Estimate)

October 4, 2010

Study Record Updates

Last Update Posted (Estimate)

April 27, 2012

Last Update Submitted That Met QC Criteria

April 26, 2012

Last Verified

April 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • R21DA026829 (U.S. NIH Grant/Contract)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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