Table 2.

Framing of choice question

Sub-group	Choice question
Patients	(If received prior treatment): For each scenario please imagine that your doctor has advised that you need to receive further treatment and you have a choice between the given options. You can choose treatment A, treatment B or you can choose ‘neither’ if you have no clear preference for either.
	(If not received prior treatment): For each scenario please imagine that your doctor has advised that you need to undergo treatment and you have a choice between the given options. You can choose treatment A, treatment B or you can choose ‘neither’ if you have no clear preference for either.
Nurses	For each scenario please imagine that the doctor has advised your patient that they need to receive treatment and they have a choice between the given options. Patients can choose treatment A, treatment B or they can choose ‘neither’ if they have no clear preference for either. Please indicate which choice you think would be your preference for the patient.
Physicians	For each scenario please imagine that you have advised your patient that they need to receive treatment and they have a choice between the given options. Patients could choose treatment A, treatment B or they could choose ‘neither’ if they have no clear preference for either. Please indicate which choice would be your preference for the patient.
Carers	For each scenario please imagine that the doctor has advised that the person you care for will need to receive treatment and you have a choice between the given options. You can choose treatment A, treatment B or you can choose ‘neither’ if you have no clear preference for either.