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Assessment of a Digital Health Platform Using Web Analytics and User Experience Measurements: Quantitative Study
Lior Weinreich1, Louisa-Marie von Kontz1, Björn Witzel1
1Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Faculty of Medicine, Ludwig Maximilian University of Munich University Hospital, Munich, Germany.
Background:
In recent years, the field of digital health has grown exponentially, leading to notable benefits, such as easier access to health-related information, but also to content saturation and misinformation. Thus, it is crucial to identify digital health tools that provide meaningful value and assess them in real-world settings.
Objective:
This preregistered study aims to quantitatively assess the Lernstörungen Online-Diagnostik und Intervention (LONDI) platform, a German platform designed for different user groups supporting children with learning disorders. This assessment focused on user groups of mental health professionals (ie, learning therapists and school psychologists) and was grounded in 4 of the 5 reach, effectiveness, adoption, implementation, and maintenance (RE-AIM) framework dimensions: reach, adoption, implementation, and maintenance.
Methods:
Data were collected over a 10-month period between May 1, 2024, and March 1, 2025. The reach dimension was measured via a pop-up questionnaire (n=1324) collecting demographic and professional experience data. The adoption dimension was measured via a second pop-up questionnaire (n=160) measuring user experience (UX) and reuse intention for the platform's help system. The implementation dimension was measured via web analytics (N=37,133) measuring reading time for pages intended for mental health professionals. Moreover, this dimension was also assessed by comparing chatbot engagement rates with industry benchmarks, in the absence of established benchmarks for digital health chatbots. The maintenance dimension was measured via web analytics as well, comparing the use in the previous (n=20,496) and current platform versions (N=37,133) in terms of number and location of users, time spent on the platform, number of actions per visit, and used devices and software.
Results:
A total of 21.90% (291/1324) and 10.64% (141/1324) of the users who filled out the first pop-up questionnaire stated that they were learning therapists or school psychologists, respectively, exceeding their percentage in the German population (<0.01%). The second pop-up questionnaire revealed an overall mean UX score of 1.54 (SD 1.14), surpassing the benchmark average, and UX ratings predicted intention to reuse. Time spent on the pages intended for mental health professionals was below the time needed to read them. The 0.18% rate of chatbot engagement was very low compared with industry benchmarks of 35% to 40%. Use changed in the 2 time periods compared, and most strikingly, there was an 81.2% (n=16,637) increase in the number of users.
Conclusions:
The study provides evidence of the LONDI platform's positive contribution to public health in terms of the reach, adoption, and maintenance dimensions of the RE-AIM framework. Further research and endeavors are needed to better understand and improve the platform's contribution in terms of the implementation dimension.
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