Role of the HLA-DQ locus in the development of chronic gastritis and gastric carcinoma in Mexican patients

Table 5 HLA-DQB1 allele frequencies in Mexican patients with gastric cancer according to H pylori status

DQB1*	H pylori +		H pylori -		Healthy
	n = 8		n = 18		n = 198
	n	af	n	af	n	af
*0501	4	0.500a	5	0.277b	12	0.060
*0201	2	0.250	0	0	33	0.166
*0401	1	0.040	1	0.100	0	0
*0602	1	0.125	0	0	15	0.075
*0604	0	0	1	0.055	3	0.015
*0301	0	0.125	7	0.388	34	0.171
*0302	0	0.125	4	0.222	48	0.242

af: Allele frequencies;

^aP = 0.001, vs healthy individuals, OR = 15.5, 95% CI: 2.80-87.68;

^bP = 0.007, vs healthy individuals, OR = 5.96, 95% CI: 1.55-22.55.