Severity of ulcerative colitis is associated with a polymorphism at diamine oxidase gene but not at histamine N-methyltransferase gene

Table 2 ABP1 genotypes and allele frequencies among overall UC patients and healthy controls

Genotype	UC patients		Healthy controls		OR (95% CI)	p
	n	% (95% CI)	n	% (95% CI)
C/C	101	44.1 (37.7-50.5)	137	52.5 (46.4-58.5)	0.71 (0.49-1.04)	0.064
C/G	115	50.2 (43.7-56.7)	108	41.4 (35.4-47.3)	1.43 (0.98-2.08)	0.050
G/G	13	5.7 (2.7-8.7)	16	6.1 (3.2-9.0)	0.92 (0.41-2.08)	0.832
Total subjects	229		261
C allele	317	69.2 (65.0-73.4)	382	73.2 (69.4-77.0)	1.21 (0.92-1.60)	0.17
G allele	141	30.8 (26.6-35.0)	140	26.8 (23.0-30.6)
Total alleles	458		522