The definition of asthma remission in children: A scoping review by the WAO Paediatric Asthma Committee

Background: Asthma remission has emerged as a potential therapeutic goal. However, definitions of remission have primarily focused on adult populations, with limited consensus on how remission should be defined in children. Objective: To comprehensively review how asthma remission has been defined in children and to evaluate consistency and applicability of these definitions. Methods: This scoping review was conducted following PRISMA-ScR guidelines. PubMed MEDLINE was searched for studies published between January 2010 and February 2024. Eligible studies included children with asthma and reported definitions of remission. Key remission criteria were extracted and categorized, and hierarchical cluster analysis was used to identify key patterns. Results: Twenty-nine studies met the inclusion criteria. Most (79.3%) defined paediatric asthma remission based on the absence of clinical symptoms. The most common remission timeframe ranged from 1 to 2 years. A medication-free criterion was used in 68.9% of studies. On-treatment remission was reported in the minority of studies, but it is increasingly acknowledged as a valid outcome. Objective assessments, such as normal lung function (21%) and absence of bronchial hyperresponsiveness (10.3%), were infrequently included. Cluster analysis revealed 3 main patterns for remission definition: symptom-based, event-based, and 1 including objective criteria. Conclusion: Current definitions of asthma remission in paediatric populations are predominantly symptom-based, with limited inclusion of objective physiological measures. Establishing consensus-based definitions for remission tailored to paediatric populations is essential to ensure clinical relevance and alignment with real-world disease patterns.