https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3915431/
To conclude, the B blood group in blood donor was more susceptible to hypertension and obesity. The commonest ABO blood group was group B in blood donors with Rh negativity at only 4.55%. This was in contrast to the prevalence of ABO and Rh blood groups in other parts of the world as well as also within the country.