Asthma phenotypes, risk factors, and measures of severity in a national sample of US children

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Murine Model of Allergen Induced Asthma
08:05

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Published on: May 14, 2012

Colleen F Kelley1, David M Mannino, David M Homa

  • 1Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.

Pediatrics
|March 3, 2005
PubMed

Insights

Asthma risk factors and severity differ across childhood asthma phenotypes. Identifying these distinct groups is key to understanding varied health outcomes in children.

Area of Science:

  • Pediatric pulmonology
  • Epidemiology
  • Allergy and immunology

Background:

  • Asthma is a common chronic respiratory disease in children.
  • Understanding distinct asthma phenotypes is crucial for targeted management.
  • Previous research has not fully elucidated phenotype-specific risk factors and severity in a national sample.

Purpose of the Study:

  • To investigate differences in risk factors and severity measures among distinct asthma phenotypes in US children.
  • To analyze a nationally representative sample of children aged 6 to 16 years.

Main Methods:

  • Utilized data from the Third National Health and Nutrition Examination Survey (NHANES).
  • Categorized children into mutually exclusive groups: atopic asthma, nonatopic asthma, resolved asthma, frequent respiratory symptoms (no asthma diagnosis), and normal controls.
  • Employed multivariate regression to identify phenotype-specific demographic and risk factors, and to compare measures of asthma severity.

Main Results:

  • Identified prevalence rates: 4.8% atopic asthma, 1.9% nonatopic asthma, 3.4% resolved asthma, 4.3% frequent respiratory symptoms.
  • Found varying risk factors: higher BMI in nonatopic asthma, prenatal maternal smoking linked to resolved asthma, childcare attendance associated with frequent respiratory symptoms.
  • Atopic and nonatopic asthma showed similar severity (medication use, health status, lung function).
  • Resolved asthma had fewer symptoms but similar lung function impairment to current asthma.
  • Children with frequent respiratory symptoms (no asthma) had normal lung function.

Conclusions:

  • Asthma risk factors and severity measures are demonstrably different across distinct childhood asthma phenotypes.
  • These findings highlight the importance of phenotyping for personalized pediatric asthma care.
Abstract

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