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

Table 4 Haplotype allele frequencies in patients with chronic gastritis according to H pylori status

DQA1-DQB1*	H pylori+		H pylori-		Healthy
	n = 48		n = 32		n = 198
	n	af	n	af	n	af
0401–0401	10	0.172ab	1	0.031	0	0
0501–0301	10	0.172	3	0.093	27	0.136
0301–0302	11	0.189	10	0.312	48	0.242
0501–0201	8	0.137	2	0.062	10	0.050
0101–0501	5	0.086	0	0	10	0.050
0201–0201	3	0.051	0	0	22	0.111
0301–0401	2	0.034	1	0.031	0	0
0302-0302	1	0.017	0	0	0	0

af: Allele frequencies;

^aP = 1 × 10^-7, vs healthy individuals, OR = 6.08, 95% CI: 4.56–8.10;

^bP = 0.03, vs H pylori -, OR = 7.15, 95% CI: 1.2-158.8.