Measurements of Exhaled Nitric Oxide in Healthy Subjects in Thailand (NCT02554617)

Study summary

The purpose of this study is to determine fractional exhaled nitric oxide (FeNO) level in healthy subjects among Thai populations.

Read the detailed description

Fractional exhaled nitric oxide (FeNO) were produced from epithelial cells of inflammatory airways and eosinophils and this gas was discovered since 1991.

Fractional exhaled nitric oxide (FeNO) has direct association with severity of inflammation of bronchial trees and sputum eosinophils and use for additional investigation for diagnosis asthma or inflammatory airway diseases.

There are many factors from previous studies that associate with level of fractional exhaled nitric oxide (FeNO), one of that factors is race therefore we can't use level from another studies with different race for use as reference and there is no study about level of fractional exhaled nitric oxide in Thai population.

It is therefore desirable to examine level of fractional exhaled nitric oxide (FeNO) in healthy subjects among Thai population and will be the main objective of this research.

Conditions studied

Normal Non-fluency

Keywords

healthy people
fractional exhaled nitric oxide (FeNo)
factors

In context

Lead sponsor

Mahidol University is the lead sponsor of 731 studies on the registry; 116 are open to participants now.

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

Who can participate

Ages eligible: 6 Years to 60 Years
Sexes eligible: All
Accepts healthy volunteers: Yes
Sampling method: Non-probability sample

Study population

community sample

Inclusion criteria

healthy subjects in community

Exclusion criteria

Exclusion Criteria:

smoker or past history of smoking
asthma, allergic rhinitis, chronic respiratory disease or other chronic illness
history of wheezing within 12 months before enrollment
history of upper or lower respiratory tract infection within 6 weeks before enrollment
drink ethanol within 48 hours before enrollment
drink caffeine within day before enrollment
during pregnancy
chronic use of any drugs
participate other project within 30 days

Study design

Observational model: Case-only
Time perspective: Cross-sectional
Enrollment: 100 participants (actual)

What researchers measure

Primary outcomes

fractional exhaled nitric oxide level
Time frame: 10 minutes (average time ), on the day of enrollment

Study locations

1 site

Siriraj Hospital
Bangkok, 10700, Thailand

Updates

Tracking since Sep 25, 2026

No changes since tracking began. The registry record was last updated on May 3, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗

Registry details

Key details

Study ID: NCT02554617
Lead sponsor: Mahidol University
Responsible party: Nualanong Visitsunthorn (Professor, Mahidol University) — Principal investigator
First posted: Sep 18, 2015
Start date: Oct 2010
Primary completion: Jun 2015
Completion: Aug 2015
Last update: May 3, 2016

Study contacts

Professor Nualanong Visitsunthorn, MD

principal investigator · Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University

Oversight

Data monitoring committee: No

View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in May 2016. You cannot join it, but the record below documents what was studied.

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Discussion

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Measurements of Exhaled Nitric Oxide in Healthy Subjects in Thailand