Prevalence and predictors of irritable bowel syndrome in patients with morbid obesity: a cross-sectional study

BMC Obesity

Table 3 Comparisons between patients with and without irritable bowel syndrome (IBS) at the two centers

	Oslo University Hospital Aker			Innlandet Hospital Trust Gjøvik
	No IBS n = 194	IBS n = 17	p-value	No IBS n = 102	IBS n = 37	p-value	Differences between patients with IBS at the two centers (p-values)
Fibromyalgia	19/194 (10%)	1/17 (6%)	0.71^##	14/101 (14%)	11/37 (30%)	0.03^#	0.08^##
Self-reported psychiatric disorder	30/194 (16%)	6/17 (35%)	0.04^#	17/102 (17%)	12/37 (32%)	0.04^#	0.84^#
Hemoglobin (g/dl)	14.2 (1.1)	13.8 (1.1)	0.23	14.6 (1.0)	14.0 (1.1)	0.006	0.53
HbA₁C (%)	5.8 (4.7–14.9)	5.5 (4.9–7.3)	0.02*	5.4 (4.5–11.5)	5.5 (4.9–9.7)	0.52*	0.94*
Bilirubin (μmol/l)	7 (2–23)	7 (4–19)	0.94*	7 (2–28)	5 (2–15)	0.03*	0.07*
Cholesterol (mmol/l)	4.9 (1.0)	5.1 (0.8)	0.44	4.9 (1.0)	5.5 (0.8)	0.001	0.05
Low-density lipoprotein (mmol/l)	3.1 (0.9)	3.3 (0.7)	0.26	3.2 (0.9)	3.7 (0.7)	0.001	0.07
Thyroid stimulating hormone (mU/l)	1.5 (0.0–7.9)	1.4 (0.2–14.6)	0.31*	1.5 (0.0–5.5)	2.1 (0.8–6.9)	0.001*	0.007*
Free T₄ (pmol/l)	15 (11–28)	16 (12–23)	0.14*	16 (10–26)	15 (11–21)	0.04*	0.02*
Vitamin B₁ (nmol/l)	157 (62–239)	145 (91–176)	0.03*	155 (104–232)	142 (112–246)	0.04*	0.58*
Use of statins	34/194 (18%)	1/17 (6%)	0.32^##	18/101 (18%)	1/37 (3%)	0.02^#	0.54^##

The results are given as number (proportion in percent) for categorical variables, mean (SD) for continuous variables with normal distribution and median (range) for other continuous variables. All the predictors that showed significant associations with IBS (p < 0.05) at one of the two centers are shown in the table. The differences between patients with and without IBS at Oslo University Hospital Aker, between patients with and without IBS at Innlandet Hospital Trust Gjøvik and between patients with IBS at Innlandet Hospital Trust Gjøvik and patients with IBS at Oslo University Hospital Aker are analyzed with t-tests, Pearson chi-squared tests (marked with ^#), Mann-Whitney U test (marked with *) or Fisher’s exact test (marked with ^##)

ISSN: 2052-9538