Table 1 Interview guides

Patients

Could you describe your experience of using the decision aid?

• Probes to explore perceptions of format, language, understanding and most useful sections

Was the decision aid useful in helping you to make a decision about your treatment?

• Probes to explore perceptions of contribution to decision making process

Could you describe your consultation with the doctor/nurse?

• Probes to explore use of decision aid within the consultation and contribution to discussion

Is there anything else that may have helped/hindered with your decision?

Do you have any suggestions for how we can improve the decision aid in the future?

Healthcare professionals

Could you describe your thoughts regarding the decision aid?

• Probes to explore perceptions of most/least useful sections

Could you describe how the consultation went with the patient?

• Probes to explore use of decision aid within the consultation and contribution to discussion and patient understanding

• Probes to compare experiences and difference to the consultation with and without a decision aid

Is there anything else that may have helped/hindered with the decision?

Do you have any suggestions for how we can improve the decision aid in the future?