Towards a Wearable Alcohol Biosensor: Examining the Accuracy of BAC Estimates From New-Generation Transdermal Technology Using Large-Scale Human Testing and Machine Learning Algorithms

Alcohol Drinking Clinical Trial

Official title:

Towards a Wearable Alcohol Biosensor: Examining the Accuracy of BAC Estimates From New-Generation Transdermal Technology Using Large-Scale Human Testing and Machine Learning Algorithms

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05692830
• Other study ID #: AA028488-01A1
• Status: Recruiting
• Phase: N/A
• Start date: April 3, 2022
• Est. completion date: September 1, 2027

Study information

• Verified date: April 2024
• Source: University of Illinois at Urbana-Champaign
• Contact: Catharine Fairbairn, PhD
• Phone: 217-300-5850
• Email: uiucalcohollab[@]gmail.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The study will employ a combined laboratory-ambulatory design. Participants will engage in ambulatory assessment over the course of 14 days, wearing biosensors assessing transdermal alcohol concentration (TAC) and providing breathalyzer readings in real-world contexts. Also during this period, participants will attend three laboratory alcohol-administration sessions scheduled at one-week intervals, with alcohol dose and rate of consumption manipulated within and between participants, respectively. Laboratory visits will also double as ambulatory orientation, check-in, and close-out sessions.

Description:

Laboratory Procedures: The aim of the laboratory study is to capture the effect of variable alcohol doses and rates of consumption on the TAC-BAC relationship across individuals in a controlled context. Laboratory alcohol-administration sessions will be held at one-week intervals, scheduled at study initiation (day 0), study midpoint (day 7), and study end (day 14).

Alcohol-administration procedures will employ a within (alcohol dose) X between (rate of consumption) participant design. All participants will consume three doses of alcohol over the course of the three laboratory sessions, targeting peak blood alcohol concentration (BAC) levels of .03%, .06%, and .09% respectively. The order of alcohol doses will be counterbalanced across participants. The exact quantity of alcohol administered to each participant in order to achieve these target peak BACs will be calculated based on individualized formulas adjusting for drinking rate, sex, height, weight, and age (see formulas provided in Watson et al., (1981)). Rate of consumption will be manipulated between participants, with equal numbers of participants assigned to consume alcohol at relatively "fast" and "slow" rates. Beverage intake will be monitored to ensure participant comfort and even consumption across the beverage administration period. After beverage administration, participants will provide breath alcohol concentration (BrAC) readings at 10- min intervals.

In addition, during the laboratory procedures, participants will be exposed to environmental factors that are known to impact the transdermal reading of the Skyn device. These manipulations will allow the research team to train the machine learning algorithm to recognize and model for these environmental effects. These manipulations include: 1) Environmental alcohol: common household products containing alcohol (e.g., hand sanitizer, perfume, lotion containing alcohol) will be sprayed or applied in proximity to Skyn; 2) Sweating: Participants will be asked to engage in a brief 10-30 minute aerobic exercise while in a seated position (i.e., stationary biking) while under the supervision of a research assistant. This brief exercise will be designed simply to yield exertion to the point of sweating and not exertion beyond this point; 3) Arm Movements: Participants will be asked to engage in isolated body movements (e.g., arms and feet) to determine whether device shifting caused by such movements impact readings taken by Skyn.

Ambulatory Procedures: This arm of the study aims to capture the TAC-BAC relationship among participants drinking in everyday settings. Ambulatory assessment will take place over 14 days. During laboratory session 1, prior to beverage administration, participants will be oriented to ambulatory study procedures. The Skyn device will be worn throughout participation. During orientation, participants will be trained to use the mobile breathalyzer. To avoid contamination of breathalyzer readings by mouth alcohol, participants will be instructed to wait 5 minutes after their last sip of alcohol to provide a reading. Also during this orientation session, participants will receive training in standard drink reporting (used to validate breathalyzer readings). During ambulatory assessment, participants will provide breathalyzer readings in response to both random and user-initiated prompts via their smartphones. On day 14 of the study, participants will attend a final laboratory session during which they will return study equipment as well as complete questionnaires asking them to reflect on their experience using the Skyn and their likelihood to adopt a Skyn application.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 240
• Est. completion date: September 1, 2027
• Est. primary completion date: August 1, 2026
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 21 Years and older

Eligibility

Inclusion Criteria:

• 21 years or older

• drink alcohol at least 2x weekly

Exclusion Criteria:

• psychological or medical conditions that might contraindicate alcohol-administration

• history of adverse reaction to type and amount of beverage used in the study

• currently seeking treatment for alcohol use disorder

• does not drink alcohol regularly

• taking drugs or medications for which alcohol consumption would be contraindicated

• women who are pregnant or are attempting to become pregnant

Related Conditions & MeSH terms

• Alcohol Drinking
• Alcohol Intoxication
• Alcoholic Intoxication

Intervention

Drug:
• Alcohol
Alcohol administered orally at multiple doses and consumption speeds to test transdermal device accuracy

Locations

Country	Name	City	State
United States	University of Illinois at Urbana-Champaign	Champaign	Illinois

Sponsors (2)

Lead Sponsor	Collaborator
University of Illinois at Urbana-Champaign	National Institutes of Health (NIH)

Country where clinical trial is conducted

United States, 

References & Publications (27)

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* Note: There are 27 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in Breath Alcohol Concentration During Laboratory Visits	change in alcohol concentration through breath provided in the laboratory	From beginning to end of alcohol administration visit, measured every ten minutes, up to 12 hours
Primary	Change in Ambulatory Breath Alcohol Concentration	change in measure of alcohol concentration through breath provided in the field	up to 2 weeks