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%
(2) 4.5%
Controls
(11) 27.3%
(28) 63.6%
(3) 6.8%
P value
<0.05
<0.01
NS