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Accuracy of Self-estimation of Blood Alcohol Concentration Compared to Object Values

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02722564
Enrollment
55
Registered
2016-03-30
Start date
2015-08-31
Completion date
2015-12-31
Last updated
2017-05-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Alcohol Intoxication

Brief summary

This will be a prospective survey study. The participants will all be volunteers of legal drinking age. Each participant will consume one alcoholic beverage (beer) at a time and then will be asked to verbally estimate their current blood alcohol concentration and if the subject feels they are able to drive. At that time, their BAC level will be measured objectively using a breath alcohol test (BAT) device. The participant will not be told their objective value. This will continue with a verbal estimate and actual BAT reading after every drink until the participant reaches a minimum BAC of 0.10. At this time, participants will continue to be monitored until their BAC falls to 0.08 and they are clinically sober. As their blood alcohol level decreases, the investigators will ask the participant to estimate their level every hour along with an actual reading until reaching 0.08. Statistical analyses will be used to determine how accurate self estimation is in regards to blood alcohol content.

Interventions

BEHAVIORALself estimation of breath alcohol content
DEVICEbreath alcohol content as measured by Alco Sensor IV device
OTHERdrink a beer

drink a beer, repeat until breath alcohol content 0.1

Sponsors

St. Luke's Hospital and Health Network, Pennsylvania
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
SINGLE

Eligibility

Sex/Gender
ALL
Age
21 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* over the legal age (21years old) to drink alcohol.

Exclusion criteria

* Volunteers will be excluded from the study if they suffer from any of the following conditions: Alcoholism, Diabetes, Kidney/bladder stones, Kidney disease, Liver disease, Stomach ulcer, Organ transplant patients, Dialysis patients, and patients with alcohol allergies.

Design outcomes

Primary

MeasureTime frameDescription
Change in Breath Alcohol Content Between the Estimated Level and the Actual Level as Measured by an Alco Sensor IV Device1 dayThe change was measured both when participants' breath alcohol content was ascending to 0.1 and descending to 0.08.

Countries

United States

Participant flow

Participants by arm

ArmCount
All Study Participants
subject will self estimate breath alcohol content after each beer ingested self estimation of breath alcohol content record breath alcohol content as measured by breathalyzer drink a beer: drink a beer, repeat until breath alcohol content 0.1
55
Total55

Baseline characteristics

CharacteristicAll Study Participants
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
0 Participants
Age, Categorical
Between 18 and 65 years
55 Participants
Race and Ethnicity Not Collected— Participants
Region of Enrollment
United States
55 participants
Sex: Female, Male
Female
22 Participants
Sex: Female, Male
Male
33 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
8 / 55
serious
Total, serious adverse events
0 / 55

Outcome results

Primary

Change in Breath Alcohol Content Between the Estimated Level and the Actual Level as Measured by an Alco Sensor IV Device

The change was measured both when participants' breath alcohol content was ascending to 0.1 and descending to 0.08.

Time frame: 1 day

Population: The number analyzed for ascending BrAC readings and descending BrAC readings

ArmMeasureGroupValue (MEDIAN)Dispersion
All Study ParticipantsChange in Breath Alcohol Content Between the Estimated Level and the Actual Level as Measured by an Alco Sensor IV DeviceBrAC ascending to 0.10.01 percent blood alcohol contentStandard Deviation 0.02
All Study ParticipantsChange in Breath Alcohol Content Between the Estimated Level and the Actual Level as Measured by an Alco Sensor IV DeviceBrAC descending to 0.08-0.01 percent blood alcohol contentStandard Deviation 0.04
p-value: <0.001t-test, 2 sided
p-value: <0.0001t-test, 2 sided

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026