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

Table 2 Prevalence and attributable fraction in the Giardia exposed for four functional disorders six years after initial outbreak of Giardia in Bergen, Norway 2004

Disorder	All	Giardia exposed		Controls
Disorder	All	(N = 724)		(N = 847)
	N	n	%	n	%	p-value^b)	AFE	95 % CI
No functional disorder^a)	819	269	38.2	550	68.3	<0.001	n.a.	n.a.
Overactive bladder syndrome	247	134	18.7	113	13.6	0.007	27.5	(8.8, 42.4)
Irritable bowel syndrome	387	287	40.1	100	11.9	<0.001	70.3	(63.6, 75.8)
Chronic fatigue	320	224	31.6	96	11.4	<0.001	64.0	(57.1, 71.0)
Functional dyspepsia	200	147	21.0	53	6.6	<0.001	68.6	(57.7, 76.7)

Abbreviations: n.a. not applicable; AFE attributable fraction in the exposed, i.e. the proportion of diseased (in percent) that could have been prevented in the Giardia exposed had the individuals not been exposed to Giardia; CI confidence interval
a) Respondents classified with neither IBS, CF, FD nor OAB; b) p-value for the difference between the Giardia exposed and the control group was calculated with Pearson’s exact χ² test

ISSN: 1471-230X