NCT03194256

Brief Summary

This study is designed to examine how the nicotine content of cigarettes and the nicotine concentration and flavors in e-liquids influence responses to and use of these products in adolescent smokers. Participants will complete a total of six sessions (an in-person screening/baseline session and five lab sessions.

Trial Health

87
On Track

Trial Health Score

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

Enrollment
80

participants targeted

Target at P50-P75 for not_applicable

Timeline
Completed

Started Sep 2018

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

First Submitted

Initial submission to the registry

June 7, 2017

Completed
14 days until next milestone

First Posted

Study publicly available on registry

June 21, 2017

Completed
1.2 years until next milestone

Study Start

First participant enrolled

September 1, 2018

Completed
4.2 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

October 28, 2022

Completed
1 month until next milestone

Study Completion

Last participant's last visit for all outcomes

November 30, 2022

Completed
1 year until next milestone

Results Posted

Study results publicly available

December 18, 2023

Completed
Last Updated

December 18, 2023

Status Verified

November 1, 2023

Enrollment Period

4.2 years

First QC Date

June 7, 2017

Results QC Date

October 26, 2023

Last Update Submit

November 27, 2023

Conditions

Keywords

SmokingCigarettesE-Cigarettes

Outcome Measures

Primary Outcomes (5)

  • Number of Cigarette Puffs Taken (0 to 20)

    The number of cigarette puffs selected during a 30 minute choice procedure when no vaping device was available

    30-minute preference task

  • Number of Cigarette Puffs Taken (0 to 20) When the Available Vaping Device Has 3mg/ml of Nicotine and Was Available in Tobacco Flavor

    The number of cigarette puffs selected during a 30 minute choice procedure when the available vaping device has 3mg/ml of nicotine and was available in tobacco flavor

    30-minute preference task

  • Number of Cigarette Puffs Taken (0 to 20) When the Available Vaping Device Has 3mg/ml of Nicotine and Was Available in Non-tobacco Flavors

    The number of cigarette puffs selected during a 30 minute choice procedure when the available vaping device has 3mg/ml of nicotine and was available in non-tobacco flavors

    30-minute preference task

  • Number of Cigarette Puffs Taken (0 to 20) When the Available Vaping Device Has 18mg/ml of Nicotine and Was Available in Tobacco Flavor

    The number of cigarette puffs selected during a 30 minute choice procedure when the available vaping device has 18mg/ml of nicotine and was available in tobacco flavor

    30-minute preference task

  • Number of Cigarette Puffs Taken (0 to 20) When the Available Vaping Device Has 18mg/ml of Nicotine and Was Available in Non-tobacco Flavors

    The number of cigarette puffs selected during a 30 minute choice procedure when the available vaping device has 18mg/ml of nicotine and was available in non-tobacco flavors

    30-minute preference task

Secondary Outcomes (9)

  • Number of E-cig Puffs Taken (0 to 20) When the Available Vaping Device Contained 3mg/ml Nicotine and Was Available in Tobacco Flavor

    30-minute preference task session

  • Number of E-cig Puffs Taken (0 to 20) When the Available Vaping Device Contained 3mg/ml Nicotine and Was Available in Non-tobacco Flavors

    30-minute preference task session

  • Number of E-cig Puffs Taken (0 to 20) When the Available Vaping Device Contained 18mg/ml Nicotine and Was Available in Tobacco Flavor

    30-minute preference task session

  • Number of E-cig Puffs Taken (0 to 20) When the Available Vaping Device Contained 18mg/ml Nicotine and Was Available in Non-tobacco Flavors

    30-minute preference task session

  • Carbon Monoxide Change From pre-to the Post-choice Task When no Vaping Device Was Available

    30-minute preference task

  • +4 more secondary outcomes

Other Outcomes (16)

  • Number of Choices for Cigarette Puffs

    30-minute preference task at each of the 5 laboratory sessions

  • Number of Choices for E-cig Puffs

    30-minute preference task at each of the 5 laboratory sessions

  • Number of Choices to Abstain From Puffing

    30-minute preference task at each of the 5 laboratory sessions

  • +13 more other outcomes

Study Arms (2)

Normal Nicotine Content Cigarettes

ACTIVE COMPARATOR

Spectrum Research Cigarettes: 15.8 mg nicotine/g tobacco, 9 mg of tar

Behavioral: Spectrum Research Cigarettes

Very Low Nicotine Content Cigarettes

EXPERIMENTAL

Spectrum Research Cigarettes: 0.4 mg nicotine/g tobacco, 9 mg of tar

Behavioral: Spectrum Research Cigarettes

Interventions

Participants will be assigned to either normal nicotine content cigarettes or very low nicotine content cigarettes.

Normal Nicotine Content CigarettesVery Low Nicotine Content Cigarettes

Eligibility Criteria

Age15 Years - 20 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64)

You may qualify if:

  • Ages 15-20
  • Adolescents who report current daily or near daily cigarette smoking for at least 3 months
  • Must have used an electronic nicotine device on a minimum of two lifetime occasions.
  • Breath Carbon Monoxide (CO) levels \> 5 ppm (if \< 5 ppm, then cotinine assay via NicAlert Strip = \> 3)
  • Speak, comprehend, and read English well enough to complete study procedures

You may not qualify if:

  • Unwilling to use research cigarettes or ENDS as part of the study
  • Intention to quit smoking in the next 30 days
  • Using tobacco products (other than ENDS or roll-your-own tobacco) \> 15 days in the past 30 days.
  • Any medical or psychiatric condition in which participation is likely to post a significant threat to health or for which the condition could interfere with the ability of the participant to fully participants (as determined by the LMP)
  • Self-reported illicit use of any drug except marijuana \> 10 days in the past 30 days
  • Binge drinking alcohol (\>10 days in the past 30 days, \>4/5 drinks in a 2-hour period (female/male))
  • Pregnant or breastfeeding
  • CO reading \> 80 ppm
  • Systolic BP outside the range of 90-159, diastolic BP outside the range of 50-99, or heart rate outside the range of 45-104. Participants failing for any of these criteria will be allowed to re-screen once per criterion.
  • Indicating Yes on Questions 4-6 on the MINI with a suicide attempt in the past 2 years (if within the past 2-10 years, LMP approval required).
  • Having participated in another research study during the past year in which they were switched to reduced nicotine cigarettes for longer than one week.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Brown University School of Public Health

Providence, Rhode Island, 02912, United States

Location

MeSH Terms

Conditions

Cigarette SmokingVapingSmoking

Condition Hierarchy (Ancestors)

Tobacco SmokingBehaviorTobacco Use

Results Point of Contact

Title
Suzanne Colby
Organization
Brown University

Study Officials

  • Suzanne Colby, PhD

    Brown University

    PRINCIPAL INVESTIGATOR
  • Jennifer Tidey, PhD

    Brown University

    PRINCIPAL INVESTIGATOR

Publication Agreements

PI is Sponsor Employee
Yes

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
Participants will be blind to the nicotine content of their assigned study cigarette and the nicotine dose of the e-liquid in the study vaping device. Investigators, research staff, and biostatisticians will also be blind to the conditions. E-liquid flavors will not be blinded.
Purpose
OTHER
Intervention Model
PARALLEL
Model Details: Mixed between subjects and within-subjects design. Random assignment to the between subjects factor (nicotine content in cigarettes), within-subjects manipulation of nicotine concentration and flavors in e-liquid in the electronic cigarettes
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

June 7, 2017

First Posted

June 21, 2017

Study Start

September 1, 2018

Primary Completion

October 28, 2022

Study Completion

November 30, 2022

Last Updated

December 18, 2023

Results First Posted

December 18, 2023

Record last verified: 2023-11

Data Sharing

IPD Sharing
Will share

Intend to share findings from this research through publications and presentations. Institutions and individuals wishing to access any resources or data must contact the Principal Investigator (Hatsukami). Data will be available in two formats. One will be a summary of the data, with graphs and tables, posted as pdf files and as raw individual-level data for analysis. Data generated by this grant will be made to outside investigators, according to NIH Guidance. When data are shared, there will be no limits placed on how the data will be used. Users will agree, however, that the recipient must not transfer the data to other users and that the data are only to be used for research purposes. A record of transfer of data and a copy of the dataset that was distributed will be kept by Brown University.

Time Frame
Data will not be available until primary and secondary papers are accepted for publication.
Access Criteria
Persons requesting data must do so in writing, identifying their affiliation and how the data will be used. Upon review, access will be determined.

Locations