Table 1.

Attributes and levels included in the scenarios

Attribute	Level
Administration method	• Subcutaneous self-administration at home
	• Intravenous administration by a health care professional at hospital
Risk of adverse events	• High risk of adverse events
	• Low risk of adverse events
Pain relief and improvement in functional capacity	• Pain relief and improvement in functional capacity
	• No pain relief and no improvement in functional capacity
Duration of effect (time until perceiving the need for a new dose)	• 1 week
	• 2 weeks
	• 4 weeks
	• 8 weeks