Box 2.

Attributes and levels included in discrete choice experiment

Attribute	Level
Model of care	GP led — you schedule an appointment during normal clinic hours at your local general practice. Your BP is measured and any necessary changes to your medication are made by your GP. Pharmacist led — you attend a walk-in service (no appointment required) at your local pharmacy. Your BP is measured by the pharmacist, and medication changes are made by the pharmacist in accordance with plan made by you and your GP. Telehealth — you measure your BP at home using an automated BP device which automatically transmits the results to your GP. Your GP will review the measurements you made to make any necessary changes to your medication. You will not have to schedule any clinic appointments for your BP as long as it remains controlled. Self-management — you measure your BP at home using an automated BP device. You are responsible for making any necessary medication changes, according to a protocol agreed beforehand with your GP.
Frequency of measurement	Every month Every 3 months Every 6 months Every 12 months
Risk	By using this service, you will be 5% less likely to have a stroke or heart attack in the next 5 years By using this service, you will be 10% less likely to have a stroke or heart attack in the next 5 years By using this service, you will be 15% less likely to have a stroke or heart attack in the next 5 years By using this service, you will be 25% less likely to have a stroke or heart attack in the next 5 years
Annual cost to the NHS	£50 £100 £250 £500

BP = blood pressure.