Table 1.

General study outline

Study design1	Cohort and disease	Number of families	Number of individuals	Women
Case control study	Healthy unrelated controls		333	162
	Swedish IBD families	191
	IBD		347	157
	CD		150	69
	UC		166	71
	IBD-U		31	17
Family based approach	Non-Swedish families	463
	IBD		715	398
	CD		528	297
	UC		151	83
	IBD-U		36	18

¹Including Claudin (CLDN)1, CLDN2, CLDN4. IBD: Inflammatory bowel disease; CD: Crohn’s disease; UC: Ulcerative colitis; IBD-U: Unclassified colitis.