Study of relationship between abo and rh blood group with type 2 diabetes mellitus and its complications- is there any association?

Aims & Objectives: The present study is to evaluate the relationship between ABO and Rh blood groups with type 2 Diabetes Mellitus and its complications.
Materials and Methods: It is a Prospective case control study with sample size of 400 (200 cases & 200 control) done in MVJ medical college & research hospital, Hoskote.
Results: Chi-square test results showed that there was a negative association between the ABO blood groups and DM type 2. It was found that B blood groups were negatively associated with DM type 2 (P=0.016). Blood group A is more likely associated with Diabetic Nephropathy (p value=0.012) & Blood group B & AB are less likely associated with diabetic nephropathy. Blood group B is more likely to be associated with Diabetic Retinopathy (p value =0.016) and Blood group O & A is less likely to be associated with Diabetic Retinopathy. Blood group A was more commonly seen in diabetic nephropathy patients & blood group AB less commonly seen but there was no statistical significance.
Conclusion: From our study we conclude that the Blood group B is less likely to be associated with diabetes mellitus.Blood group A are more likely associated with Diabetic Nephropathy.