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Sitaru, S.* ; Tizek, L.* ; Buters, J.T.M. ; Ekebom, A.* ; Wallin, J.E.* ; Zink, A.*

Assessing the national burden of allergic asthma by web-search data, pollen counts, and drug prescriptions in Germany and Sweden.

World Allergy Organiz. J. 16:100752 (2023)
Publ. Version/Full Text DOI PMC
Open Access Gold
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Background: Asthma and its main phenotype allergic asthma are prevalent, chronic, and complex diseases affecting 4% of the population. One main trigger for allergic asthma exacerbations is pollen. Online health information search behavior by people is increasing, and analysis of web-search data can provide valuable insight into disease burden and risk factors of a population. Objectives: We sought to perform a web-search data analysis and correlation to climate factors and pollen in 2 European countries. Methods: We analyzed the national web-search volume for allergic asthma-related keywords in Germany and Sweden from 2018 to 2021 and correlated it to local pollen counts, climatic factors, and drug prescription rates. Results: Per capita, more searches were conducted in Sweden than in Germany. A complex geographic stratification within the countries was observed. Search results were seasonal with a peak in spring and correlated with pollen counts in both countries. However, anti-asthmatic drug prescription rates in Sweden, as well as temperature and precipitation in both countries, did not correlate with search volume. Conclusion: Our analysis offers population-level insights about this complex disease by reporting its needs and establishing the correlation to pollen counts, which enables a targeted approach in the public health management of allergic asthma. Local pollen counts, as opposed to temperature or precipitation, might be good predictors of allergic asthma disease burden.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Allergic Asthma ; Climate ; Drug Prescriptions ; Google ; Pollen; Follow-up; Exacerbations
e-ISSN 1939-4551
Quellenangaben Volume: 16, Issue: 2, Pages: , Article Number: 100752 Supplement: ,
Publisher BioMed Central
Publishing Place Radarweg 29, 1043 Nx Amsterdam, Netherlands
Non-patent literature Publications
Reviewing status Peer reviewed