MedicineCardiologyPhysiologyClinical EpidemiologyEpidemiologyPathophysiologyBlood Group PhysiologyCardiovascular DiseaseHeart FailureDiuretic MechanismsPopulation Blood Group FrequenciesSmoking-related Cardiac Risk
human blood groups, we would certainly have suggested that the small differences of blood-group frequency among different sorts of smoker and between smokers and non- smokers were most probably the effect of sampling varia- tion. As it is, our results are not in conflict with those of Cohen and Thomas (1962), and it is still possible, therefore, that an association between blood group B and smoking may exist generally. Most encouraging is the fact that this association may be of the relatively simple form of a contrast between those who have never smoked and those who have, the former showing an excess of group B. Such an excess is present in both negro and white males in Cohen and Thomas's series and in the present series. It is to be hoped that further data will be accumulated by other workers; the fact that the apparent association is with the relatively rare blood group B means that large numbers will be required before chance can be ruled out as its source.
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