**2.1 Online diary**

As the HE assessments took place across a wide geographical space and were often were planned with very short notice, observations and interviews could not be carried out on location. Moreover, as the time window for carrying out the investigations covered a period of approximately two months, we could not rely on the therapists to recall investigations carried out in the initial part of the period. Therefore, we developed an online diary that therapists could use to continually document their experiences with the HE app.

The diary was set up as an online reporting tool by means of the survey tool Kalus (www.kalus.dk). A combination of open questions and fixed-choice questions was used. No questions were mandatory, as voluntary responses are known to be more useful. Groups of questions were developed under the themes of background data, today's intervention, HE as a tool for cooperation, next steps in the case, and HE as a digital tool. Prior to its use for data collection, the diary was pretested with colleagues and one of the participants to check for clarity, wording, length, and relevance. The participants were asked to complete the diary within 24 hours of each intervention to ensure detail and accuracy in the reflections. A total of 35 diary reports were sent out to the participants. Of these, 30 were filled out during the focal period.

As the diaries included open-ended and closed questions, we could carry out different analyses. The quantitative elements of the questionnaire were subjected to univariate statistical analyses. Thematic analysis was used for the open questions. In the results section, we refer to open questions from the diaries using quotes followed by (OD).

#### **2.2 Focus group interview**

A qualitative descriptive approach in the form of a focus-group interview, as described by Malterud [18], was used to collect data on the participants' thoughts and experiences with the HE application in their daily work. The aim was to gather more detailed information about the occupational therapists' experiences with the HE app, to encourage the participants to discuss and exchange their experiences, and to clarify the information reported in the diaries.

An interview guide containing mainly open-ended questions was prepared ahead of the focus-group interview. Furthermore, a PowerPoint presentation covering the most significant results from the online diaries was put together in order to facilitate the participants' thoughts and reflections during the interview. The points taken from the diary were anonymized to ensure that no one individual felt that he or she was on display during the focus-group interview.

The focus-group interview was conducted by two researchers. The participants were encouraged to speak as frankly as possible and were told that all proposals emerging from the discussions were of interest. Data were collected until saturation was achieved. The focus-group interview lasted 90 minutes and was recorded on video. It was subsequently transcribed verbatim by an external transcriber. As the

focus-group was conducted in Danish, the quotes used here have been translated into English. In the following, we refer to the focus group using quotes from the transcript followed by (FG).
