Cumulative effects of genetic variation and tobacco smoking habits on oesophageal cancer risk.

aSNP or interaction was analysed in Mixed Ancestry subjects.bSNP or interaction was analysed in Black Ancestry subjects.AOR, odds ratios adjusted for age, gender, place of birth, alcohol consumtion and family history of cancer; CI, confidence interval; ND, not determined (zero genotypes were found in one genotype group); Significant and border significant AORs are printed in bold.