Leveraging web search data to explore public interest in psoriasis in Germany

Abstract

AbstractBackgroundLittle is known about what people are interested in when they search the web for psoriasis. The monitoring of online search behaviour allows the assessment of interest in a disease on a more representative level by including people outside of medical settings.ObjectivesThis study aims to reveal relevant aspects regarding psoriasis for people consulting the web.MethodsGoogle Ads Keyword Planner was used to select and evaluate relevant German keywords for ‘psoriasis' in the study period from September 2016 to August 2020 on German territory. All keywords were qualitatively reviewed and descriptively analysed in 11 categories. One‐way analysis of variance, Welch test and Pearson's correlation coefficient were used to assess differences within Germany, annual search volumes and seasons.ResultsOverall, 11,170,740 German language Google searches on the topic of psoriasis were made. In the general category, the most commonly searched disease aspect was related to the possible contagiousness of psoriasis (n = 122,040). ‘Head’ (51.1%), followed by ‘nails’ (15.9%), ‘hands’ (8.8%), ‘feet’ (7.8%), and ‘genital/anal area’ (6.1%), was the most frequently searched for localization. Pustular forms of psoriasis were overrepresented in the search volume. Almost half of the search terms for therapy were represented by keywords related to alternative care and phytotherapy, while less than 1% related to biologics. Differences between the federal states for search volume on treatment options (p < 0.001) and between annual search volumes (p < 0.001) were found.ConclusionsQueries on pustular forms and difficult‐to‐treat areas gained high online interest, which suggests higher disease impact or underdiagnosis. The high interest in alternative therapy options suggests possible therapy dissatisfaction, lack of patient information or lack of access to guideline‐conform therapy options. The possible infectiousness of psoriasis seems to remain an issue in the general population and should be addressed accordingly.