Table 2 Patient-level demographics between dye spray groups.

Variable	Category	Never (n = 19)	Sometimes (n = 54)	Always (n = 18)	P value
Figures are median interquartile range or number (percentage). IBD, inflammatory bowel disease; IBDU, IBD unclassified; PSC, primary sclerosing cholangitis: UC, ulcerative colitis.
Year of first procedure	–	2015 (2010–2018)	2012 (2010–2014)	2015 (2013–2018)	0.002
Age PSC diagnosed	–	23 (16–55)	40 (26–55)	33 (26–48)	0.21
Age IBD diagnosed	–	26 (15–37)	34 (22–52)	27 (21–41)	0.14
Gender	Female	8 (42%)	19 (35%)	6 (33%)	0.83
	Male	11 (58%)	35 (65%)	12 (67%)
Type IBD	UC	13 (72%)	35 (65%)	15 (83%)	0.68
	Crohn’s	3 (17%)	12 (22%)	2 (11%)
	IBDU	2 (11%)	7 (13%)	1 (6%)