Prospective study confirms that bronchiolitis in early infancy increases the risk of reduced lung function at 10-13 years of age

Area of Science:

• Pediatric Pulmonology
• Respiratory Medicine
• Epidemiology

Background:

• Infant bronchiolitis is a common respiratory infection in early childhood.
• Long-term respiratory sequelae following infant bronchiolitis are not fully understood.
• Early life respiratory infections can influence lung development and function.

Purpose of the Study:

• To evaluate lung function in early adolescence among children previously hospitalized for bronchiolitis in infancy.
• To determine if infant bronchiolitis is associated with persistent or irreversible bronchial obstruction.

Main Methods:

• Prospective follow-up of 166 children hospitalized for infant bronchiolitis.
• Flow-volume spirometry performed at 10-13 years of age in cases and controls.
• Analysis of spirometry parameters before and after bronchodilation, with logistic regression.

Main Results:

• Children with a history of infant bronchiolitis showed lower forced expiratory volume in one second/forced vital capacity (FEV1/FVC) post-bronchodilation.
• A significant proportion of cases had pathological FEV1 (under the 5th percentile) compared to controls, both before and after bronchodilation.
• Infant bronchiolitis was independently associated with pathological FEV1, with higher odds ratios after bronchodilation.

Conclusions:

• Infant bronchiolitis is associated with reduced lung function, specifically lower FEV1, in early adolescence.
• The findings suggest the possibility of irreversible bronchial obstruction following infant bronchiolitis.
• Early life respiratory infections may have lasting impacts on adolescent lung health.