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Outcome measures in childhood asthma
1Sections of Allergy and Immunology, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA. skonerd@chplink.chp.edu
Insights
Standard asthma tests are difficult for young children. New methods like inflammatory marker analysis show promise for diagnosing and managing childhood asthma, offering hope for better outcomes.
Area of Science:
- Pediatric Pulmonology
- Allergy and Immunology
- Clinical Trial Methodology
Background:
- Asthma diagnosis and monitoring in preschool children present challenges due to impracticality and unreliability of standard outcome measures.
- Caregiver reports often underreport symptoms, and spirometry is difficult for very young children.
Purpose of the Study:
- To explore alternative and reliable outcome measures for assessing asthma in preschool-aged children.
- To evaluate the utility of novel pulmonary function tests and inflammatory marker analysis.
Main Methods:
- Review of recent clinical studies utilizing various techniques to measure symptoms, pulmonary function, and inflammation.
- Analysis of outcomes such as exacerbation rates, symptom frequency, quality of life, plethysmography, and inflammatory marker levels (IgE, IL-10, exhaled nitric oxide).
Main Results:
- Alternative measures like plethysmography and inflammatory marker analysis show potential for assessing pulmonary function and asthma susceptibility.
- Inflammatory markers (immunoglobulin E, interleukin-10, exhaled nitric oxide) may aid in diagnosis, intervention evaluation, and risk assessment.
Conclusions:
- While novel outcome measures show encouraging early results, their clinical utility in improving childhood asthma diagnosis and management requires further investigation.
- Inflammatory markers and advanced pulmonary function tests offer promising avenues for better asthma care in young children.
Abstract:
Although evidence suggests that asthma onset occurs early in childhood, many standard asthma outcome measures are either impractical or unreliable in preschool-aged children. In this population, for instance, patient history and symptom reports rely on the observations of caregivers, who tend to underreport their child's asthma symptoms. Furthermore, the use of conventional measures of pulmonary function such as spirometry may be impractical in very young children. Recent clinical studies have used a variety of techniques to measure symptoms, pulmonary function, and cellular mediators of inflammation. Outcomes such as discontinuation and exacerbation rates, frequency of daytime and nocturnal symptoms, and caregiver assessments of quality of life can be useful measures in evaluating outcomes in young children with asthma. Some measures, such as plethysmography and inflammatory marker analysis, may be suitable options for assessing pulmonary function and predicting asthma susceptibility in preschool-aged children. Indeed, altered levels of inflammatory markers, including immunoglobulin E, interleukin-10, and exhaled nitric oxide, may be useful tools in diagnosing asthma, evaluating interventions, and assessing future risks for asthma symptomatology in very young children. Whether 1 or more of these outcome measures will prove useful clinically in improving the diagnosis and management of childhood asthma remains uncertain, although early research results are encouraging.