Ingmar Schäfer ^* Vivienne Jahns Valentina Paucke Dagmar Lühmann Martin Scherer Julia Nothacker

• University Medical Center Hamburg-Eppendorf, Hamburg, Germany

Introduction: The web application gp-multitool.de is based on the German clinical practice guideline “multimorbidity” and supports mutual prioritisation of treatments by GPs (general practitioners) and patients. The application facilitates sending hyperlinks to standardized assessments by email, which can be completed by patients on any suitable digital device. GPs can document clinical decisions. The tool also supports a structured medication review. Aims of this study were to consider needs and wants of the target groups in implementing the guideline in a digital tool, and to identify which aspects were considered most important for customising a digital tool. Materials and methods: We conducted six focus groups with 32 GPs and six focus groups with 33 patients. Eight groups were conducted alongside the programming of the web application and four after finishing a prototype. GPs were recruited by mail and asked to invite up to six eligible patients from their practice to participate. Focus groups were based on semi-structured interview guides and discussed assessments, functionalities, usability and reliability of gp-multitool.de. Discussions were transcribed verbatim and analysed using content analysis. Results: GPs wanted to avoid unnecessary and time-consuming functions and did not want to explore problems that they could not provide solutions for. For some assessments, GPs suggested simplifying scales or including residual categories. GPs and patients also addressed possible misunderstandings due to wording and discussed if some items might be too intimate or overtax patients intellectually. In most cases, participants confirmed usability, but they suggested changes in default settings and pointed out a few minor bugs that needed to be fixed. While some GPs considered data security an important topic, most patients were unconcerned with this issue and open to share their data. Conclusion: Our study indicates that focus groups can be used to customize digital tools according to needs and wants of target groups and thus, improve their content, functionality, usability, and reliability. However, digital tools still need to be piloted and evaluated in everyday care. Study participants confirmed that gp-multitool.de can be a relevant approach for overcoming deficits in the information needed for mutual prioritisation of treatments by GPs and patients.