Methods Project 4: Clinical Trial - Amended

Not Applicable

Completed

• Conditions: Tobacco Smoking
• Interventions: Other: E-Cigarette; Other: Cigarettes; Other: Nicotine Gum or Lozenge

• Registration Number: NCT03111537
• Lead Sponsor: University of Minnesota

Brief Summary

Cigarette smokers will be randomized to E-cigarette, Nicotine Gum or Lozenge, or Control Group. Participants will enter a 1 week sampling phase. Smokers interested in continuing with the study after the sampling phase will undergo a 2 week baseline assessment phase and will then enter an 8 week intervention. Tobacco use patterns, subjective responses to product, and nicotine and toxicant exposure will be assessed.

Detailed Description

Sampling period (1 week): Subjects will be randomized to an alternative nicotine product (E-cigarette, Nicotine Gum or Lozenge) or assigned to continue smoking their usual brand cigarettes. Subjects will complete screening assessments, asked to sample the assigned product and start recording their cigarette or other tobacco intake on a daily basis using an interactive voice response system (IVR). Smokers assigned to the control condition (smoking usual brand cigarettes) will be asked to choose the product that they would like to sample.

Baseline smoking period: After sampling, subjects who meet specific criteria will continue with the experimental intervention phase. These subjects will be required to attend 2 baseline clinic visits where baseline assessments will be captured. Records of their cigarette or other tobacco intake on a daily basis will continue using the interactive voice response system (IVR).

Experimental Period: After the baseline assessment, subjects will be instructed to either partially or completely substitute their cigarette smoking with their assigned product. They will assigned to one of six experimental conditions:

1. smoking usual brand cigarette controls, who after 8-weeks will be offered any of the other nicotine products to use as they choose for 8 weeks;

2. complete substitution (i.e., no smoking) with an E-cigarette;

3. partial substitution with an E-cigarette;

4. complete substitution (i.e., no smoking) with nicotine gum or nicotine lozenge.

The assigned product, E-cigarette, Nic Gum or Lozenge, but not usual brand cigarettes, will be provided to subjects at the clinic visits. Subjects will attend clinic visits over the next 8 weeks where tobacco use patterns and biomarker data will be collected.

Study Timeline

• Study Start: 2015-05
• Study First Submitted: 2015-05-21
• Study First Submitted QC: 2017-04-06
• Study First Posted: 2017-04-13
• Primary Completion: 2018-02
• Study Completion: 2018-02
• Status Verified: 2022-09
• Last Update Submitted: 2022-09-27
• Last Update Posted: 2022-09-28

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 264

Inclusion Criteria

• Male or female subjects who are at least 18 years of age;
• Daily smoker;
• Generally good health;
• Subject has provided written informed consent to participate in the study (adolescents under the age of 18 will be excluded because this project involves continued use of tobacco products and new tobacco products);

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Exclusion Criteria

• Unstable health;
• Pregnant or breastfeeding (due to toxic effects from tobacco products);
• Unable to read for comprehension or completion of study documents.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Complete Substitution E-Cigarette	E-Cigarette	Complete substitution (i.e., no smoking) with e-cigarette use
Usual Brand Cigarette	Cigarettes	Smoking usual brand cigarette controls, who after 8-weeks will be offered alternative nicotine products and instructed for partial or complete substitution of cigarettes (subject's choice);
Partial Substitution E-Cigarette	Cigarettes	Partial substitution, encouraged to use e-cigarettes instead of smoking usual cigarettes
Partial Substitution E-Cigarette	E-Cigarette	Partial substitution, encouraged to use e-cigarettes instead of smoking usual cigarettes
Complete Substitution Nic Gum or Lozenge	Nicotine Gum or Lozenge	Complete substitution (i.e., no smoking) to nicotine gum or lozenge use

Primary Outcome Measures

Name	Time	Method
Consumer perception of the product and response to the product after sampling.	6 months	Consumer perception of the product evidenced by choice of which product to use in the trial after sampling.
Compare total nicotine equivalents (TNE) based on differing instructions for oral tobacco, nicotine replacement or e-cigarette use.	6 months	Compare the exposure to nicotine in the two instructions for use arms (complete substitution vs. partial substitution) across study products and compared to medicinal nicotine products and usual brand cigarettes.
Determine stabilization of product use (e.g., cigarette, oral tobacco, e-cigarette or medicinal nicotine patterns of use).	6 months	Examining time effects for patterns of use of cigarettes, nicotine replacement, oral tobacco or e-cigarette.
Compare NNK exposure based on differing instructions for oral tobacco, nicotine replacement or e-cigarette use.	8 weeks	Complete substitution vs. partial substitution of study products for cigarettes and compare the exposure to NNK by analyzing NNAL levels in subject urine. These products are compared to medicinal nicotine products and usual brand cigarettes.

Trial Locations

Locations (3)

Masonic Cancer Center, University of Minnesota; 🇺🇸 Minneapolis, Minnesota, United States

Ohio State University Comprehensive Cancer Center; 🇺🇸 Columbus, Ohio, United States

Roswell Park Cancer Center; 🇺🇸 Buffalo, New York, United States