Association Between Fractional Exhaled Nitric Oxide and Asthma Control (FeNO_AS)

This study has been completed.
Information provided by (Responsible Party):
Nualanong Visitsunthorn, Mahidol University Identifier:
First received: July 18, 2010
Last updated: September 17, 2015
Last verified: September 2015
The purpose of this study is to determine mean or median of fractional exhaled nitric oxide (FeNO) in Thai atopic asthmatic patients that divided into subgroups due to level of asthma control according to the global initiative for asthma guideline.

Bronchial Asthma

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Cross-Sectional
Official Title: Association Between Fractional Exhaled Nitric Oxide and Asthma Control

Resource links provided by NLM:

Further study details as provided by Mahidol University:

Primary Outcome Measures:
  • fractional exhaled nitric oxide level [ Time Frame: 10 minutes (average time), on the day of enrollment ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • scores of asthma control test: ACT [ Time Frame: 5 minutes (average time), on the day of enrollment ] [ Designated as safety issue: No ]

Enrollment: 62
Study Start Date: February 2010
Study Completion Date: December 2010
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Detailed Description:

From many previous studies, fractional exhaled nitric oxide (FeNO) has many benefits such as non-invasive, easily to perform, less time consume, has direct association with severity of inflammation of bronchial trees and sputum eosinophils, has benefit for diagnosis and monitoring the treatment in asthmatic patients.

In Thailand, this field of study is less extend, especially in children population. We hypothesized that in uncontrolled or partly controlled group may have high level of fractional exhaled nitric oxide (FeNO) than controlled group.

It is therefore desirable to examine the association between fractional exhaled nitric oxide (FeNO) and level of asthma control among atopic asthmatic Thai children and will be the main objective of this research.


Ages Eligible for Study:   7 Years to 60 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
atopic asthmatic patients in Department of Pediatrics, Siriraj hospital (tertiary care)

Inclusion Criteria:

  • clinical diagnosis of atopic bronchial asthma
  • follow up in clinic of allergy and clinical immunology, Siriraj hospital

Exclusion Criteria:

  • smoker or past history of smoking
  • has chronic disease eg. HIV infection, pulmonary hypertension, systemic lupus erythematosus, liver cirrhosis, gastroesophageal reflux, COPD, bronchiectasis
  • drink ethanol within 48 hours before enrollment
  • history of upper or lower respiratory tract infection within 6 weeks before enrollment
  • drink caffeine within day before enrollment
  • during pregnancy
  • history of systemic steroid use within 8 weeks before enrollment
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Please refer to this study by its identifier: NCT01197690

Siriraj Hospital
Bangkok, Thailand
Sponsors and Collaborators
Mahidol University
Principal Investigator: Professor Nualanong Visitsunthorn, MD Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University
  More Information

No publications provided

Responsible Party: Nualanong Visitsunthorn, Professor, Mahidol University Identifier: NCT01197690     History of Changes
Other Study ID Numbers: 602/2552(EC1)
Study First Received: July 18, 2010
Last Updated: September 17, 2015
Health Authority: Thailand: Ethical Committee

Keywords provided by Mahidol University:
Bronchial asthma
level of control of asthma
fractional exhaled nitric oxide (FeNO)
asthma control test (ACT)

Additional relevant MeSH terms:
Bronchial Diseases
Hypersensitivity, Immediate
Immune System Diseases
Lung Diseases
Lung Diseases, Obstructive
Respiratory Hypersensitivity
Respiratory Tract Diseases
Nitric Oxide
Anti-Asthmatic Agents
Autonomic Agents
Bronchodilator Agents
Cardiovascular Agents
Endothelium-Dependent Relaxing Factors
Free Radical Scavengers
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Protective Agents
Respiratory System Agents
Therapeutic Uses
Vasodilator Agents processed this record on November 27, 2015