Environmental Exposures, Genetics, and Exhaled Nitric Oxide in Pediatric Asthma

Environmental Exposures, NOS Genes, and Exhaled Nitric Oxide in Pediatric Asthma

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT00395096

Enrollment

225

Registered

2006-11-02

Start date

2006-07-31

Completion date

2008-06-30

Last updated

2021-08-09

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

Conditions

Asthma

Keywords

Exhaled Nitric Oxide, Asthma, Tobacco Smoke, Allergen

Brief summary

Asthma is one of the most common childhood diseases. It is chronic and often severely disabling. The amount of nitric oxide that is exhaled while breathing increases with airway inflammation, a symptom of asthma. This study will examine the results from a previous study, the Cincinnati Asthma Prevention (CAP) study, to evaluate the effects of environmental and genetic factors on exhaled nitric oxide (eNO) levels and to determine the relationship between eNO and asthma severity.

Detailed description

Nitric oxide is a naturally occurring gas that plays a role in many body functions. Levels of eNO increase with airway inflammation, a symptom of asthma. Researchers have proposed using eNO as a noninvasive measure to guide physicians in the treatment and medical management of asthma in children. However, more information about eNO is needed before this can happen. This study will perform a secondary analysis of the results from its parent study, the CAP study, which evaluated the effectiveness of preventing asthma in children who had been exposed to environmental tobacco smoke. This study will not enroll any new participants. Previously collected data from the CAP study will be reevaluated in this study to determine the longitudinal effects of environmental and genetic factors on eNO levels. In addition, the data will be evaluated to determine the relationship between eNO levels and asthma severity. No new data will be collected in this study.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

6 Years to 12 Years

Healthy volunteers

Inclusion criteria

* Participated in the Cincinnati Asthma Prevention Study * Diagnosis of asthma * Lives with someone that smokes at least 5 cigarettes a day

Exclusion criteria

* No additional neuromuscular or respiratory disorder that may interfere with safe participation in the parent study * Does not have electricity * Plans to move within 1 year of entry into the parent study

Design outcomes

Primary

Measure	Time frame
Effects of environmental and genetic factors on exhaled nitric oxide (eNO) levels and the relationship between eNO and asthma severity	Measured through the use of data previously collected in the Cincinnati Asthma Prevention (CAP) study

Countries

United States

Outcome results