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A Comparison of Exhaled Carbon Monoxide Measurements Using the iCOquit Smokerlyzer and Vitalograph Breath CO Monitor vs Carboxyhemoglobin From Venous Samples While Validating a Mobile Research Application

A Comparison of Exhaled Carbon Monoxide Measurements Using the iCOquit Smokerlyzer and Vitalograph Breath CO Monitor vs Carboxyhemoglobin From Venous Samples While Validating a Mobile Research Application

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT04826549
Acronym
COCO
Enrollment
30
Registered
2021-04-01
Start date
2021-03-22
Completion date
2021-10-27
Last updated
2022-01-13

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

Conditions

Smoking, Cigarette

Brief summary

The main objective of this study is to determine the accuracy and precision of the iCOquit Smokerlyzer as compared with the gold standard of COHb levels measured in venous plasma samples, as well as assessing its agreement with the Vitalograph BreathCO monitor. Validating the precision and accuracy of the iCOquit Smokerlyzer could establish an additional, less expensive, reliable method for determining smoking status in tobacco research. Additionally, the portability of the device would allow for remote biochemical verification of smoking status, thus enlarging the number of participants that can be included in intervention studies.

Interventions

None listed

Sponsors

Foundation for a Smoke Free World INC
CollaboratorOTHER
Rose Research Center, LLC
Lead SponsorINDUSTRY

Study design

Observational model
OTHER
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
21 Years to 65 Years

Inclusion criteria

1. Has signed the ICF and is able to read and understand the information provided in the ICF. 2. Is 21 to 65 years of age (inclusive) at screening. 3. No intention of quitting smoking in the next 30 days. 4. Willing and able to comply with the requirements of the study. 5. Owns a smartphone running iOS or Android with text message and data capabilities compatible with the eResearch app.

Exclusion criteria

1. Is unhealthy or cannot participate in the study for any reason (e.g., medical, psychiatric, and/or social reason) as judged by the Investigators or designated medical staff based on all available assessments from the screening period (e.g., vital signs, physical examination, concomitant medications and medical history). 2. PHQ-9 score greater than 9, or a score greater than 0 on item #9 (Thoughts you would be better off dead, or of hurting yourself in some way) at screening. 3. Body mass index (BMI) greater than 40.0 kg/m2 4. Use of any of these products in the past 30 days: 1. Illegal drugs (or if the urine drug screen is positive for cocaine, THC, amphetamines, methamphetamines, or opiates), 2. Experimental (investigational) drugs that are unknown to participant, 3. Chronic opioid use. 5. Pregnant or nursing (by self-report) or positive urine pregnancy test. 6. Participant enrollment numbers met. \-

Design outcomes

Primary

MeasureTime frameDescription
eCO Monitor Accuracy compared to COHbBaselineDetermine the accuracy and precision of the iCOquit Smokerlyzer as compared with the gold standard of COHb levels measured in venous plasma samples.
eCO Monitor's agreement with the Vitalograph BreathCO monitorBaselineComparing the CO values from the eCO Monitor and the Vitalograph BreathCO monitor.

Secondary

MeasureTime frameDescription
eRESEARCH APP VALIDATIONDaily for 5 daysValidate a new mobile app called eResearch through specific functionality testing by study participants.

Countries

United States

Outcome results

None listed

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