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Published on: August 7, 2017
Meconium Aspiration Syndrome and the Association With Preschool Asthma
Dvir Gatt1, Itamar Ben-Shitrit2, Inbal Golan-Tripto1
1Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel; Pediatric Pulmonary Unit, Saban Children's Hospital, Soroka University Medical Center, Beer-Sheva, Israel.
Background:
Meconium aspiration syndrome (MAS) is an acute neonatal respiratory disorder resulting from aspiration of meconium-stained amniotic fluid, leading to airway obstruction, inflammation, and hypoxemia. Although its perinatal presentation is well described, its long-term association with asthma remains unknown.
Research Question:
Is MAS associated with subsequent development of preschool asthma?
Study Design And Methods:
A retrospective cohort study was conducted using a national database, which included infants born between 2010 and 2024 with continuous follow-up until 6 years of age. Each child with MAS was matched 1:4 with control participants without MAS using Mahalanobis distance matching. The primary outcome was asthma, defined by the Asthma Integrated Diagnosis Index, a specific composite measure. Secondary outcomes included individual asthma-related diagnoses and medication use. Kaplan-Meier analysis was performed to evaluate time to outcome, accounting for the age at which events occurred.
Results:
Among 326,940 eligible children, 730 children (0.2%) had a diagnosis of MAS. After matching, MAS was associated with 64% higher proportion of asthma up to 6 years of age (95% CI, 1.29-2.06; P < .001). Other long-term respiratory morbidities, such as bronchiolitis and OSA, also were more frequent among survivors of MAS. Atopic conditions, including dermatitis, rhinitis, and food allergies, did not differ significantly between groups. Sensitivity analysis using inverse probability of treatment weighting supported these findings.
Interpretation:
Our results show that MAS is associated with increased risks of asthma and bronchiolitis in early childhood. These findings suggest that neonatal lung injury resulting from MAS may impair airway development, contributing to asthma inception.
Insights
Infants with meconium aspiration syndrome (MAS) face a significantly higher risk of developing asthma and bronchiolitis by age six. This suggests neonatal lung injury from MAS may impact long-term airway development.
Area of Science:
- Neonatal respiratory health
- Pediatric pulmonology
- Epidemiology
Background:
- Meconium aspiration syndrome (MAS) is a severe neonatal respiratory condition.
- While MAS's immediate effects are known, its long-term impact on asthma development is unclear.
Purpose of the Study:
- To investigate the association between MAS and the subsequent development of preschool asthma.
- To identify long-term respiratory outcomes in MAS survivors.
Main Methods:
- Retrospective cohort study using a national database (2010-2024).
- Matched 730 MAS cases with 2,920 controls (1:4 ratio).
- Assessed asthma using the Asthma Integrated Diagnosis Index (AIDI) and other respiratory outcomes until age six.
Main Results:
- MAS was linked to a 64% increased risk of asthma by age six (P<0.001).
- MAS survivors had higher rates of bronchiolitis and obstructive sleep apnea.
- No significant difference in atopic conditions (dermatitis, rhinitis, food allergies) was observed.
Conclusions:
- MAS is associated with increased risks of childhood asthma and bronchiolitis.
- Neonatal lung injury from MAS may contribute to impaired airway development and asthma onset.
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