The relationship between irritable bowel syndrome, functional dyspepsia, chronic fatigue and overactive bladder syndrome: a controlled study 6 years after acute gastrointestinal infection

Table 3 Associations between overactive bladder syndrome (OAB) and three different functional disorders among participants who could be classified with or without OAB (716 Giardia exposed and 833 controls) six years after an outbreak of Giardia in Bergen, Norway 2004

Disorder	Giardia exposed					N	Controls
	N	n	%	OR	95 % CI	N	n	%	OR	95 % CI	p-value^b)
Comorbidity
No comorbidity	307	38	12.4	1.00	reference	617	67	10.9	1.00	reference
Any comorbidity^a)	388	92	23.7	2.20	(1.46, 3.32)	181	41	22.7	2.40	(1.56, 3.70)	0.770
Irritable bowel syndrome
No IBS	424	73	17.2	1.00	reference	728	86	11.8	1.00	reference
IBS	284	60	21.1	1.29	(0.88, 1.88)	98	24	24.5	2.42	(1.45, 4.04)	0.051
Chronic Fatigue
No CF	481	65	13.5	1.00	reference	733	86	11.7	1.00	reference
CF	221	66	29.9	2.73	(1.85, 4.02)	96	26	27.1	2.79	(1.69, 4.62)	0.938
Functional dyspepsia
No FD	549	88	16.0	1.00	reference	739	96	13.0	1.00	reference
FD	145	39	26.9	1.93	(1.25, 2.97)	53	10	18.9	1.56	(0.76, 3.20)	0.619

Abbreviations: OAB overactive bladder syndrome; OR odds ratio; CI confidence interval; IBS irritable bowel syndrome; CF chronic fatigue, FD functional dyspepsia
a) Respondents classified with either IBS, CF or FD; b) p-value for effect modification by Breslow-Day test for homogeneity

ISSN: 1471-230X