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Skin-prick testing as a diagnostic aid for childhood asthma
E Y Chan1, I Dundas, P D Bridge
1Department of Paediatric Respiratory Medicine, Royal London Hospital, London, UK.
Pediatric Pulmonology
|April 15, 2005
Summary
Skin-prick testing (SPT) aids asthma diagnosis in children. This study found SPT effective, particularly in children aged 5 and older, improving diagnostic accuracy for wheeze.
Area of Science:
- Pediatric Pulmonology
- Allergy and Immunology
- Diagnostic Medicine
Background:
- Diagnosing asthma in children solely on symptoms can be unreliable.
- Objective diagnostic tools are needed to support clinical assessment.
Purpose of the Study:
- To evaluate the utility of skin-prick testing (SPT) as a diagnostic aid for asthma in children.
- To assess the performance of SPT across different age groups.
Main Methods:
- Skin-prick testing (SPT) was performed on children aged 2-10 years.
- Participants included children with no wheeze history (controls) and those with doctor-observed wheeze.
- Data were analyzed for two age groups: 2 to <5 years and 5 to 10 years.
Main Results:
- SPT sensitivity and specificity were 32% and 89% for younger children (2-<5 years), and 82% and 85% for older children (5-10 years).
- Positive predictive values for SPT were 55% in younger and 70% in older children, assuming a 30% asthma prevalence.
- SPT positivity increased significantly with age, particularly after 5 years.
Conclusions:
- Skin-prick testing demonstrates good test characteristics for aiding asthma diagnosis in children.
- SPT is a valuable diagnostic tool, even in preschool children with a high prevalence of wheeze.
- Clinicians should consider incorporating SPT into their diagnostic approach for pediatric asthma.
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