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Table 2 Frequency of the different blood groups in the study population (n = 44). The figures in parentheses are the number of the patients.

From: Hereditary risk factors for the development of gastric cancer in younger patients

Blood group O A B AB
Cases (30) 68.1% (6) 13.6% (6) 13.6% (2) 4.5%
Controls (11) 27.3% (28) 63.6% (3) 6.8% (2) 4.5%
P value <0.05 <0.01 NS NS