Multi-national observational study to assess quality of life and treatment preferences in patients with Crohn’s perianal fistulas

Table 1 Discrete choice experiment attributes and levels

Attribute	Level
	1	2	3	4
Postoperative discomfort	Low	Medium	High	-
Fistula healing: Proportion of patients who have fistula closure/fistula healing and minimal fluid collection in the fistula after treatment	48%	55%	60%	95%
Fecal incontinence: Proportion of patients who experienced fecal incontinence after treatment	0%	16%	20%	34%
Recurrence: Proportion of patients with a return of symptoms related to anal fistula (discharge, pain, odor) after treatment	15%	25%	35%	60%
Rehabilitation time: Time taken to resume normal daily activities	Up to 1 wk	More than 1 wk, up to 4 wk	-	-
Invasiveness: Does the treatment involve cutting or puncturing of the skin?	Yes, involves cutting or puncturing and insertion of surgical instruments into the anal area	Yes, involves minimal cutting or puncturing and an injection of the treatment into the anal area	-	-