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Published on: May 15, 2013
Risk factors for the persistence of respiratory symptoms in childhood asthma
N N Bahçeciler1, I B Barlan, Y Nuhoğlu
1Marmara University Hospital, Department of Pediatrics, Istanbul, Turkey. aonder@attglobal.net
Insights
Low initial lung function (FEF25%-75%) and allergen sensitivity predict persistent respiratory symptoms in children with asthma. These factors are key indicators for long-term symptom management in pediatric asthma patients.
Area of Science:
- Pediatric Pulmonology
- Allergy and Immunology
Background:
- Asthma is a common chronic respiratory disease in children.
- Identifying predictors of persistent symptoms is crucial for effective management.
Purpose of the Study:
- To identify parameters predicting the persistence of respiratory symptoms in asthmatic children receiving uniform therapy.
Main Methods:
- Retrospective review of 279 asthmatic children's records.
- Data included spirometry, prick tests, and clinical follow-up.
- Mean follow-up duration was 3 years.
Main Results:
- 30% of patients had no respiratory symptoms in the prior 12 months.
- Higher initial total IgE and allergen sensitivity correlated with persistent symptoms.
- Lower initial FEF25%-75%, FEV1, and FEV1/FVC were observed in symptomatic children.
Conclusions:
- Initial low FEF25%-75% and allergen sensitivity are significant predictors of persistent respiratory symptoms in pediatric asthma.
- These findings aid in risk stratification for long-term symptom persistence.
Objective:
To evaluate the parameters which could predict the persistence of respiratory symptoms in asthmatic children who have been treated with a considerably uniform therapy.
Methods:
A retrospective review was performed on the records of 279 children with asthma. An end of study visit, results of spirometry and prick tests completed the data. The mean age at referral and at final visit was 6.2 +/- 3.7 years and 8.9 +/- 4.1 years, respectively; and the children were followed up for a mean of 3 +/- 1.2 years.
Results:
Eighty-five of the 279 patients (30%) experienced no respiratory symptoms in the previous 12 months. There was no significant difference between those with and without current respiratory symptoms with respect to age, sex, age at onset of symptoms, duration of followup, age at referral, therapeutic choice, severity of asthma and duration of symptoms at referral. For subjects with current respiratory symptoms the initial serum total IgE level, and the percentage of RAST/prick test positivity was significantly higher than those without current respiratory symptoms (P = 0.0027, P = 0.011, respectively). Although the initial FEF 25%-75%, FEV1, and FEV1/FVC was significantly lower in those with current respiratory symptoms (P = 0.003; P = 0.005; and P = 0.04, respectively), there was no statistically significant difference between lung functions of the two groups at the end of followup. The persistence of respiratory symptoms was significantly predicted by initial FEF25%-75% and sensitivity to allergens (P = 0.03 and P = 0.04, respectively).
Conclusions:
We concluded that the risk factors for the persistence of respiratory symptoms in our patient population have been low FEF25%-75% value and sensitivity to allergens at referral.
Related Concept Videos
Asthma: Pathogenesis and Management
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Asthma-I: Introduction
Asthma-II: Pathophysiology and Classification
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Asthma-III: Symptoms and Complications
Classification of Asthma
Asthma I: Introduction
Asthma III: Clinical Manifestations

