Table 1 Overview of the steps in the development process

Steps

Name of the step

What was conducted

Date

Step 1

Literature search

• Qualitative systematic review

June—December 2020

Step 2

Interviews with stakeholders

• 1 GP

• 2 Experts

• 3 Patient/relative dyads

November 2020—February 2021

Step 3

Drafting the intervention prototype

• Dialog tool

• Symptom assessment scale

February—April 2021

Step 4

Professionals' assessment of the intervention

Interviews with:

• 4 GPs

• 3 Nursing home staff groups

April—May 2021

Step 5

Refinement of the intervention

• Adjusting the intervention based on the interviews

• Evaluation of the intervention with 1 expert (from step 2)

May—June 2022