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Table 3 Odds ratios (OR) and 95% confidence interval (CI) of the association between ABO genotypes and gastric cancer riska

From: Blood groups A and AB are associated with increased gastric cancer risk: evidence from a large genetic study and systematic review

  First allele
Second allele O A B
O
 No. of cases 1480 1308 1169
 No. of controls 1906 1508 1569
 Multivariable-adjusted OR (95% CI) Reference 1.14 (1.03–1.26)* 0.96 (0.87–1.07)
A
 No. of cases 255
 No. of controls 313
 Multivariable-adjusted OR (95% CI) 1.07 (0.89–1.29)
B
 No. of cases 496 224
 No. of controls 547 315
 Multivariable-adjusted OR (95% CI) 1.18 (1.02–1.36)* 0.95 (0.78–1.15)
  1. aOR, 95% CI and P-value were derived from unconditional logistic regression models adjusted for age, sex, and study site
  2. OR odds ratio, CI confidence interval
  3. * indicates statistically significant