Table 3 Study objectives and survey tools

1) To explore patients’ views on deprescribing specific medications and compare how they differ by country.

1) Two questions from the revised Patients’ Attitudes Towards Deprescribing (rPATD) questionnaire [47].

2) To assess patients’ willingness to have medications deprescribed by medication type.

2) Questions on hypothetical deprescribing decisions related to patients’ own medications.

3) To analyse if and how patients’ hypothetical deprescribing decisions are associated with the three types of the Patient Typology (a qualitative framework).

3) Questions based on the typology of three ‘types’ of older adults (the Patient Typology) [28].

4) To analyse the association between patients’ perceived trust and relationships with their GP and their willingness to make deprescribing decisions.

4) Questions from the abbreviated Wake Forest Trust in Physician Scale [48].

5) To compare patients’ and GPs’ hypothetical deprescribing decisions and to examine the role of patient-provider relationships with regards to the agreement between patients and GPs.

5) GP questionnaire asking if and why GPs would stop/reduce any of their patients’ medications, questions regarding their relationship with the patient, and sociodemographic questions. We also use adapted questions from the Control Preference Scale [49], GP typology [46], and Prescribers’ Perceptions of Medication Discontinuation Survey [50].

6) To explore the views of older adults on the use and deprescribing of herbal and dietary supplements.

6) Questions on the use of herbal or dietary supplement by patients.