To characterize global research trends in the epidemiology of allergic disorders from 2016 to 2025 using bibliometric and science-mapping techniques, complemented by evidence mapping, to address critical knowledge gaps.
Key Findings:
Scientific production increased steadily with an annual growth rate of 7.59%, accelerating after 2020.
Research was concentrated in a few leading countries, primarily the United States and China.
Keyword and thematic analyses indicated a strong focus on asthma, particularly in pediatric populations.
Risk-factor research dominated across all allergic phenotypes (83–89%), while burden-of-disease studies were scarce (<7%).
Asthma had the largest evidence base, while non-asthma conditions showed limited coverage.
Interpretation:
Global allergy epidemiology research has expanded but remains geographically concentrated and structurally imbalanced, with significant gaps in burden estimation and incidence data for several allergic phenotypes, highlighting the need for future research to address these disparities.
Limitations:
Research is heavily centered on asthma and risk-factor studies, with potential biases in data sources.
Critical gaps persist in burden estimation, incidence data, and outcome-focused studies.
Conclusion:
Addressing disparities through broader geographic inclusion and balanced epidemiologic investigation is essential for improving global allergy research and ensuring comprehensive understanding of allergic conditions.
