THE RESULTS OF THE STUDY OF BLOOD GROUP AND COLORECTAL CANCER INTERRELATION

Introduction. Several studies showed a correlation between blood groups and cancer of the stomach and the pancreas. However, the obvious links between colorectal cancer and blood groups have been found. In this context, the main objective of this work is to analyze the association between colorectal cancer and blood groups among the population of Southern Kazakhstan.

Materials and methods. The study was conducted in two phases. The first phase calculated the share of each blood group (according to ABO and Rh systems) among 87329 donors of Blood Transfusion Centre (city of Shymkent). The second phase of the retrospective analysis of disease history in patients with colorectal cancer, according to the Regional Oncology Center (city of Shymkent). Each story is reviewed, based on such factors as patient’s age, gender, blood group (according to ABO and Rh systems), localization of colorectal cancer, stage of the disease.

Results. The research defined the following distribution of blood groups for the population of South-Kazakhstan region:  0 - 31.76%, A - 31.3%, B - 27.18%, AB - 9.76%, Rh (+/-)-95.09%, Rh (-)-4.91%. The level of interconnection between blood groups and disease was assessed as insignificant (V = 0.081 and V = 0.073 for ABO and Rh, respectively). Analysis of the relation of blood group and the left colon cancer demonstrates week correlation (χ2 (3) = 8.233, p = 0.041). The strength of the relation between ABO blood group and the tumor of this localization was assessed as average (V = 0.265).

Conclusion. The received results do not imply a correlation between blood groups and colorectal cancer. However, there is weak correlation regarding the intercorrelation of cancer lesions of the left colon and I(0) blood group in the study population. 

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