Persistent airflow obstruction in inner-city children with asthma

Area of Science:

• Pediatric Pulmonology
• Asthma Research
• Airway Remodeling

Background:

• Asthma is characterized by persistent airway remodeling, impacting lung function despite controller medications.
• Early airflow obstruction in asthmatic children can lead to long-term poor lung function outcomes.

Purpose of the Study:

• To investigate if early airflow obstruction in inner-city children with asthma persists despite guideline-based asthma care.
• To determine the long-term lung function trajectory in children with asthma stratified by initial lung function.
• To identify factors associated with persistent poor lung function in pediatric asthma.

Main Methods:

• Retrospective cohort study of inner-city children with asthma.
• Stratification into "low" or "high" lung function groups based on initial spirometry (FEV1% predicted and FEV1/FVC).
• Follow-up of lung function (FEV1% predicted and FEV1/FVC) for up to 10 years with guideline-based asthma treatment.

Main Results:

• Children with initially "high" lung function maintained normal levels (FEV1% predicted 94-96%, FEV1/FVC 87-89%) over 10 years.
• Children with initially "low" lung function showed only slight improvements (FEV1% predicted 77-82%, FEV1/FVC 78-82%) over 10 years.
• Low initial lung function, African American ethnicity, and male gender were associated with increased risk of persistent poor lung function.

Conclusions:

• Early airflow obstruction in inner-city children with asthma is linked to poor lung function later in life, irrespective of guideline-based care.
• Current asthma therapies may not effectively target the underlying pathways driving airway remodeling in pediatric asthma.
• Further research is needed to develop treatments that can reverse or prevent persistent airflow obstruction and airway remodeling in children with asthma.