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TerminatedNCT02841735Updated Dec 3, 2018

Young Adult Naturalistic Alcohol Study (YANAS) Using Smartphone Technology in a Simulated Laboratory Environment

An observational study in Alcohol Use, Alcohol Drinking and Drinking Behavior, sponsored by University of Florida. Terminated at 1 site in United States. Open to participants aged 21 Years to 25 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-12-03.

Sponsored by University of Florida · Observational

Why this study was terminated
Protocol expired with IRB.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
9
Ages
21 Years to 25 Years
Sex
All
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Study summary

It is important to explore use of technology to reduce drinking. The purpose of this research study is to compare different types of mobile technology for their effects on alcohol drinking and ratings of usability among young adults.This study will be conducted in four phases: a web-based screening assessment; brief appointment on the day of the alcohol drinking session; alcohol drinking session; and a follow-up appointment. Participation in this study will last approximately two months.

02

Conditions studied

  • Alcohol Use
  • Alcohol Drinking
  • Drinking Behavior

Keywords

  • brief intervention
  • web-based interventions
  • harm reduction
  • young adult
  • college student
03

In context

Alcohol Drinking

701 studies on the registry are indexed under Alcohol Drinking; 133 are open to participants now.

This study's enrollment of 9 is below the median of 312 across 74 observational studies indexed under Alcohol Drinking.

Browse Alcohol Drinking studies →

Lead sponsor

University of Florida is the lead sponsor of 1,287 studies on the registry; 199 are open to participants now.

Of its 180 completed or terminated interventional studies of FDA-regulated products, 143 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
21 Years to 25 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Interested individuals will contact the study by telephone or by email or will go directly to the study's information page located at www.yanasinfo.org.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Be able to read English and complete assessments
  • Drink alcohol regularly

Exclusion criteria

Exclusion Criteria:

  • Test positive on a urine test for use of certain illegal drugs
  • Undergraduate student enrolled in the University of Florida
  • Graduate students from the College of Health and Human Performance at the University of Florida
  • Pregnant, or breast feeding
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
9 participants (actual)
Patient registry
No

Groups and cohorts

  • Smartphone breathalyzer device & app

    This is a small device that attaches to a smartphone with an accompanying app that produces accurate breath alcohol readings when a user blows into a small tube attached to the device. Participants randomized to this study condition will have the opportunity to use this device and app during an alcohol drinking session in a simulated laboratory.

    Device: Smartphone breathalyzer device/app use

  • BAC estimator app

    This is an app that produces estimated blood alcohol content (eBAC) readings based on sex, weight, number of drinks and time taken to consume drinks. Participants randomized to this study condition will have the opportunity to use this app during an alcohol drinking session in a simulated laboratory.

    Device: BAC estimator app use

  • Text Messaging

    A procedure whereby one sends a text message to the phone one is using after each alcoholic drink. Participants randomized to this study condition will have the opportunity to the text messaging procedure during an alcohol drinking session in a simulated laboratory.

    Device: Text messaging procedure

Interventions

  • DeviceSmartphone breathalyzer device/app use

    Participants randomized to this condition will be able to blow into the smartphone breathalyzer after consuming each alcoholic drink, which produces an accurate breath alcohol reading on the app. These breath alcohol readings may inform participants' subsequent decisions regarding drinking.

  • DeviceBAC estimator app use

    Participants randomized to this condition will be able to make an entry into the BAC estimator app after consuming each alcoholic drink, which produces an estimated blood alcohol concentration based on the individual's sex, weight, number of alcoholic drinks and time spent drinking alcohol. These estimated blood alcohol concentrations may inform participants' subsequent decisions regarding drinking.

  • DeviceText messaging procedure

    Participants randomized to this condition will be instructed to send a text to a smartphone they will use for the study after each alcoholic drink. A consideration of the number of texts sent may inform participants' subsequent decisions regarding drinking.

06

What researchers measure

Primary outcomes

  1. Quantity of alcohol consumption

    Compare forms of mobile technology for their effects on alcohol consumption

    Time frame: During an alcohol drinking session

07

Study locations

1 site
  • Department of Health Education and Behavior
    Gainesville, Florida 32611, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Jul 2016, a primary completion of Feb 2018 and a completion of Feb 2018. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 20, 2016
First posted
Jul 22, 2016
Start
Jul 2016
Primary completionActual
Feb 3, 2018
CompletionActual
Feb 3, 2018
Last update
Dec 3, 2018
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 3, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02841735
Responsible party
Sponsor
First posted
Jul 22, 2016
Start date
Jul 2016
Primary completion
Feb 3, 2018
Completion
Feb 3, 2018
Last update
Dec 3, 2018

Study contacts

Robert F. Leeman, Ph.D.
principal investigator · University of Florida

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Nov 2018. You cannot join it, but the record below documents what was studied.

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