Table 2. Comparison of mortality, length of stay, hospital cost and IBD complications between ulcerative colitis patients with and without Helicobacter pylori infection.

IBD: inflammatory bowel disease; n: sample size; OR: odds ratio; CI: 95% confidence interval; AOR: adjusted odds ratio; ACI: adjusted confidence interval; n/a: not applicable; SD: standard deviation.

	Ulcerative colitis without Helicobacter pylori (n=405,491)	Ulcerative colitis with Helicobacter pylori (n=805)	Odds Ratio (CI)	p-value	AOR (CI)	Adjusted p-value
Mortality (%)	33,296 (8.22)	28 (3.48)	0.403 (0.276 to 0.588)	<0.05	0.33 (0.212 to 0.512)	<0.05
IBD-associated arthropathy	709 (0.17)	0 (0)	0.998 (0.998 to 0.998)	0.235	n/a	n/a
Erythema nodosum	330 (0.08)	0 (0)	0.998 (0.998 to 0.998)	0.418	n/a	n/a
Uveitis	182 (0.04)	1 (0.12)	2.77 (0.388 to 19.794)	0.289	2.964 (0.413 to 21.283)	0.28
Primary sclerosing cholangitis	5,201 (1.28)	3 (0.37)	0.288 (0.093 to 0.895)	<0.05	0.394 (0.126 to 1.227)	0.108
Lower gastrointestinal bleed	21,942 (5.4)	82 (10.19)	1.983 (1.577 to 2.492)	<0.05	1.972 (1.525 to 2.551)	<0.05
Bowel obstruction	8,785 (2.17)	16 (1.99)	0.916 (0.558 to 1.503)	0.728	1.073 (0.643 to 1.793)	0.786
Intra-abdominal abscess	3,608 (0.89)	1 (0.12)	0.139 (0.019 to 0.985)	<0.05	0.165 (0.023 to 1.175)	0.072
Intestinal perforation	8,743 (2.16)	9 (1.12)	0.513 (0.266 to 0.99)	<0.05	0.408 (0.182 to 0.912)	<0.05
Ileostomy	7,600 (1.87)	9 (1.12)	0.592 (0.307 to 1.142)	0.114	0.664 (0.315 to 1.4)	0.282
Colostomy	3,294 (0.81)	4 (0.49)	0.61 (0.228 to 1.63)	0.319	(0.28 to 2.005)	0.565
			Mean Difference (CI)	p-value	AOR (CI)	Adjusted p-value
Mean Length of Stay (SD)	7.82 days (10.691)	7.72 (8.573)	0.109±0.377 (-0.96 to 0.85)	<0.05	1.005 (0.997 to 1.013)	0.256
Mean Total Charges (SD)	$65,652.63 (113,213.548)	$47,557.67 (87,006.814)	18,094.962±4,043.126 (10,170.558 to 26,019.365)	<0.05	1 (1-1)	<0.05