Associations Between ABO Blood Groups and Diseases in the Digestive System and Vein

Area of Science:

• Medical Science
• Genetics
• Epidemiology

Background:

• The ABO blood group system is vital for transfusions but its association with digestive and venous diseases remains unclear.
• Understanding these links can improve disease prediction and management.

Purpose of the Study:

• To investigate the relationship between ABO blood groups and specific digestive system diseases and venous thrombosis.
• To determine if ABO blood type influences the risk of Crohn's disease (CD), ulcerative colitis (UC), stomach cancer (SC), colorectal cancer (CRC), pancreatic cancer (PC), liver cancer (LC), and venous thrombosis (VT).

Main Methods:

• A retrospective study analyzed ABO blood group distributions in 1432 CD, 416 UC, 1140 SC, 841 CRC, 384 PC, 520 LC, and 563 VT patients against 896 healthy controls (NC).
• Statistical analyses included unpaired t-tests, chi-squared tests, and multivariate logistic regression to assess associations between ABO blood groups and CD/VT.

Main Results:

• ABO blood group distributions did not significantly differ for UC, SC, CRC, PC, and LC patients compared to NC.
• However, CD and VT patients showed significant differences, with lower rates of type O and higher rates of type AB blood.
• Multivariate analysis confirmed that non-O blood types were associated with a higher risk of CD (OR=1.355) and VT (OR=1.465) compared to blood group O.

Conclusions:

• ABO blood group distributions in Crohn's disease and venous thrombosis patients significantly differ from healthy controls.
• Non-O blood groups may represent a novel predictive factor for the development of CD and VT.