Table 1.

IBS cases (n = 493) and controls (n = 2773) divided in sex and age

	IBS cases		Controls
	n	%	n	%
Sex:
Male	140	28.0	1292	46.5
Female	353	72.0	1481	53.4
Age:
18 to 24	40	11.3	435	15.7
25 to 44	147	41.6	1171	42.2
45 to 64	166	47.0	1167	42.0