Abstract
BACKGROUND: The internet is one of the most important sources for health-related information for the general population. Therefore, the analysis of internet search engines can help to capture the social interests and needs regarding diseases. OBJECTIVES: The aim of this study was to investigate the search queries related to atopic dermatitis (AD) regarding frequency, focus of interest and temporal occurrence in the German federal states in order to identify possible regional differences. MATERIAL AND METHODS: Using the Google Ads Keyword Planner, AD relevant keywords including the monthly search volume between January 2017 and December 2020 were identified, which were then assigned to different categories. RESULTS: Overall, 1419 keywords were found that had a search volume of 14,817,610 queries. The category 'general' had the highest search volume (n = 5,970,840), but most keywords were assigned to the category 'location' (n = 348). About 60% of the keywords assigned to 'location' were related to AD on the face. On a national level, Bremen and Hamburg had the highest search volume per 100,000 inhabitants. With more than 70%, an enormous increase in search volume could be observed, which was especially high in 2020. DISCUSSION: With this internet search analysis, it was possible to clarify which aspects of AD were of particular importance for the German population, which can help to adapt information campaigns to the target population. In addition, the study underlines the increasing relevance of the internet as a source of information regarding health-related topics.