NCT04279483

Brief Summary

The purpose of the study is to learn more about the relationships between the brain, behavior, and natural daily exposure to particular environments, including the places where smokers regularly spend time and specific retail outlets.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
343

participants targeted

Target at P75+ for not_applicable

Timeline
Completed

Started Dec 2019

Longer than P75 for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

December 17, 2019

Completed
2 months until next milestone

First Submitted

Initial submission to the registry

February 14, 2020

Completed
7 days until next milestone

First Posted

Study publicly available on registry

February 21, 2020

Completed
4.3 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

June 10, 2024

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

June 10, 2024

Completed
1.2 years until next milestone

Results Posted

Study results publicly available

August 14, 2025

Completed
Last Updated

August 14, 2025

Status Verified

July 1, 2025

Enrollment Period

4.5 years

First QC Date

February 14, 2020

Results QC Date

June 10, 2025

Last Update Submit

July 29, 2025

Conditions

Keywords

smokingsmokertobaccocigarettecigarettesPhiladelphiahealthy

Outcome Measures

Primary Outcomes (4)

  • Self-reported Cigarette Craving During the Experimental Manipulation Period

    Participants were asked 4 times per day, for the 28 days of the intervention period, to rate their level of craving for a cigarette. They responded to the question "Right now, how much do you want to smoke a cigarette?" using a 100-point scale from 0 (not at all) to 100 (extremely). Craving ratings were first averaged within each day, for each participant; then were averaged across the intervention period days for each participant; and finally averaged across participants in each group.

    4-week experimental manipulation period

  • Self-reported Number of Cigarettes Smoked Per Day During the Experimental Manipulation Period

    Participants were asked 2 times per day, for the 28 days of the intervention period, to respond to the question, "Within \[timeframe\], how many cigarettes did you smoke?". We calculated a daily sum for each individual, imputing missing counts from the average of that individual's prior reports (missing values for the first daily survey were imputed from the average of that participant's first daily survey answers; and vice versa for the second survey). We averaged the daily counts for each participant, and then averaged across participants.

    4-week experimental manipulation period

  • Brain Activity (Measured by Functional Magnetic Resonance Imaging) in a Priori Regions of Interest, in Response to Standardized Smoking vs Nonsmoking Cues.

    In key neural cue reactivity regions (based on prior work), we extracted estimates of neural activity during exposure to standardized smoking cues (e.g., photographs of a cigarette pack) and during exposure to standardized nonsmoking cues (approximately compositionally matched, e.g., a pack of pencils). We used SPM12 to create first-level (within-subject) linear regression models to estimate BOLD (blood oxygenation level dependent) activity at each voxel across all repetitions of each task condition, within each subject; and to create contrast estimates comparing task conditions. We used nilearn tools to average task condition contrast estimates across voxels within the regions of interest for each participant. The data values below reflect this contrast estimate - the difference in neural activity as percent change in BOLD signal between the standardized smoking cues condition and the standardized nonsmoking cues condition.

    [Time Frame: For 822815, fMRI scan 1 (at least 2 weeks after initial enrollment); for 850796, fMRI scan 1 (at least 6 weeks after initial enrollment)]]

  • Brain Activity (Measured by fMRI), in a Priori Regions of Interest, in Response to Retail Smoking vs Nonsmoking Cues

    In key neural cue reactivity regions (based on prior work), we will extract estimates of neural activity during exposure to images showing the cash register area at a convenience store which sells tobacco products, and has tobacco products and tobacco marketing on display behind the register (the "power wall"; tobacco retail images), and during exposure to nonsmoking cues. We used SPM12 to create first-level (within-subject) linear regression models to estimate BOLD (blood oxygenation level dependent) activity at each voxel across all repetitions of each task condition, within each subject; and to create contrast estimates comparing task conditions. We used nilearn tools to average task condition contrast estimates across voxels within the regions of interest for each participant. The data values below reflect this contrast estimate - the difference in neural activity as percent change in BOLD signal between the retail smoking cues condition and the nonsmoking cues condition.

    [Time Frame: For 822815, fMRI scan 1 (at least 2 weeks after initial enrollment); for 850796, fMRI scan 1 (at least 6 weeks after initial enrollment)]]

Study Arms (3)

Tobacco Retailer Group

EXPERIMENTAL

Participants visit a tobacco retailer 5 times per week during the 4-week (20 store visits total) intervention period

Behavioral: Tobacco retailer

Non-tobacco Retailer Group

EXPERIMENTAL

Participants visit a non-tobacco retailer 5 times per week during the 4-week (20 store visits total) intervention period

Behavioral: Non-tobacco retailer

Control

NO INTERVENTION

Participants are not asked to alter their behavior during the 4-week (0 store visits) intervention period

Interventions

Assigned to make a small (\~$3.00) purchase from a tobacco retail store(s) using a study-provided debit card during each retail environment visit

Tobacco Retailer Group

Assigned to make a small (\~$3.00) purchase from a store that does not sell tobacco (non-tobacco retailer) using a study-provided debit card during each retail environment visit.

Non-tobacco Retailer Group

Eligibility Criteria

Age21 Years - 65 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Be between the ages of 21-65
  • Smoke at least 5 cigarettes a day for the past 6 months
  • Own an iPhone or Android smartphone that can be used on a daily basis
  • Plan to be in PA, DE, or NJ (for the remote cohort) or the Philadelphia metropolitan area (for the fMRI cohort) for the next 3 months, with the exception of short periods of absence (no longer than 3 consecutive days and no more than 10 days in total)
  • Read and speak English fluently
  • Fully vaccinated against COVID-19

You may not qualify if:

  • Current enrollment or plans to enroll in a smoking cessation program in the next 3 months
  • Plan to use nicotine substitutes or smoking cessation treatments in the next 3 months
  • Urine cotinine test at Session 1 indicates a non-smoker level of cotinine
  • Pregnancy
  • Inability or refusal to install Google Maps or LifeData applications on mobile phone
  • Inability or refusal to upload Google Timeline data after receiving instructions and guidance from a researcher
  • Inability to provide informed consent or complete any of the study tasks as determined by the Principal Investigator and/or Study Physician.
  • Any physical or visual impairment that may prevent the individual from using a computer keyboard or completing any study tasks.
  • During the first two weeks of the study, failure to complete the study tasks (e.g., response to at least 75% of the brief EMA survey questions).
  • The phones of potential participants will be assessed by trained recruiters either during in-person recruiting or during a phone call used to invite eligible participants who filled out the online screening survey for the first appointment. Specifically, recruiters will assess whether phones' functionality allows easy reception and sending of text messages, the use of the geolocation tracking and LifeData applications, whether potential participants have an existing Google account (created prior to Jan 2024), and whether phones have an adequate battery life to allow participants to fulfill study requirements.
  • Any medical condition or concomitant medication that could compromise participant safety or treatment, as determined by the Principal Investigator and/or Study Physician.
  • Currently or recently (within the last 5 years) receiving treatment for substance abuse (e.g., alcohol, opioids, cocaine, marijuana, or stimulants). Treatment of substance use disorders that occurred greater than 5 years prior to study participation is acceptable if participants are in stable condition
  • Report consuming any of the following drugs within the past two weeks or indicate plans to do so within the coming 6 weeks during the initial recruitment call: Benzodiazepines, Amphetamines, Methamphetamines, Cocaine, MDMA, Methadone, Barbiturates, PCP, Heroin, Oxycodone, Opiates (e.g., morphine, heroin), Buprenorphine.
  • Test positive for any of the above drugs at Appointment 1 (822815) or at the scan appointment (850796)
  • Schizophrenia or psychosis, regardless of treatment status
  • +13 more criteria

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

University of Pennsylvania

Philadelphia, Pennsylvania, 19104, United States

Location

Related Publications (99)

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MeSH Terms

Conditions

Tobacco SmokingSmokingCigarette Smoking

Condition Hierarchy (Ancestors)

BehaviorTobacco Use

Limitations and Caveats

Due to COVID-19 pandemic-related constraints and delays, we were unable to reach our goal of 60 complete datasets per condition. We prioritized remote participation and made fMRI scans optional. This resulted in few participants completing fMRI scans. Our planned analyses investigating the effects of intervention group assignment on smoking and craving are well-powered with this sample size, but examination of intervention effects on neural responses to tobacco marketing is not possible.

Results Point of Contact

Title
Emily Falk
Organization
University of Pennsylvania

Study Officials

  • Emily Falk, PhD

    University of Pennsylvania

    PRINCIPAL INVESTIGATOR

Publication Agreements

PI is Sponsor Employee
No
Restrictive Agreement
No

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
INVESTIGATOR
Masking Details
Investigator will not know the condition assignment of individual participants unless reassessment is triggered by the stopping rule.
Purpose
OTHER
Intervention Model
PARALLEL
Model Details: Random assignment of retail environment (tobacco retailer, non-tobacco retailer, control \[no store\]) to visit 5 times per week during the 4-week intervention period
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

February 14, 2020

First Posted

February 21, 2020

Study Start

December 17, 2019

Primary Completion

June 10, 2024

Study Completion

June 10, 2024

Last Updated

August 14, 2025

Results First Posted

August 14, 2025

Record last verified: 2025-07

Data Sharing

IPD Sharing
Will share

* The final data set will include data from 310 subjects in PA, NJ, or DE. Data (collected via questionnaires, urine cotinine assessments, and smartphone applications) will include measures concerned with health behaviors, individuals' geospatial distance from nearby tobacco retail outlets, and personality and individual differences. 822815 and the fMRI subset of 850796 will include data from the brain imaging scan(s). 822815 will also include saliva cotinine assessments conducted during 2 of the 3 in-person sessions. * Final research data, with all identity-related information deleted and in consultation with the relevant IRBs, will be made available to scientists who are approved by the study team for collaborative research with members of the study team. Data will be shared in spreadsheet format for all non-imaging data and in NIFTI format for fMRI data. Unthresholded statistical maps for the fMRI data will be made available to researchers through a secure file-sharing interface.

Shared Documents
STUDY PROTOCOL, SAP, ICF, ANALYTIC CODE
Time Frame
The data will be available within six months following publication of the study's primary results. Data will remain available for a minimum of three years following the closeout of the grant.
Access Criteria
* Data will be made available to scientists who are approved by the study team for collaborative research with members of the study team. * Qualified investigators who wish to access the study materials will be able to complete a form on the main project website on GitHub (https://github.com/cnlab), which describes the proposed study and delineates the data specifics of data use. The requests will be reviewed and approved by the investigators. The requested research data files will be accompanied by a description of variables and how they were collected. We will also share protocols relevant to data collection procedures, as useful and in consultation with other interested researchers. * Study tasks and code to reproduce analyses will be made available on the Falk lab GitHub account (https://github.com/cnlab) * Statistical Analysis Plans will be available in the form of pre-registrations on the Open Science Framework site (https://osf.io).
More information

Locations