IL1B-31, IL1RN and TNFA-307 genotypic frequencies in H. pylori-positive (n = 47) and –negative children (n = 78).

a

It was not possible to genotype 1 H. pylori-positive children for IL1B-31 and 1 for IL1RN.

b

1 indicates all the long alleles and 2 the short allele. The loci did not deviate significantly from the expected Hardy-Weinberg distribution (P = 0.90 for IL1B-31, P = 0.26 for IL1RN and P = 0.08 for TNFA-307) and all segregated independently.