Table 5.

Prevalence of specific human leukocyte antigen DQ2/8 alleles between gastrointestinal and control populations n (%)

Overall	Gastrointestinal	Controls	Risk
DQ2 and DQ8	2 (0.45)	1 (0.2)	1:45
DQ2, β1*02/*02	17 (3.8)	13 (2.4)	1:63
DQ8, β1*02 positive	8 (1.8)	4 (0.7)	1:39
β2, β1*02/*02	11 (2.5)	2 (0.4)	1:16
DQ2, β1*02/X	85 (19.2)	106 (19.2)	1:100
DQ8, β1*02 negative	32 (7.2)	36 (6.5)	1:90
β2, β1*02/X	41 (9.3)	53 (9.7)	1:104
α5 + other	247 (55.8)	336 (60.9)	1:101
Total	443	551

Omnibus DQ2/8 positive vs DQ2/8 negative χ²; P = 0.16. IBS: Irritable bowel syndrome; IBD: Inflammatory bowel disease.