Are you obsessive compulsive and blood type A? Do you also have sleeping disorders? Certain blood type frequencies have been standing out in numerous studies examining a connection between blood types and what is considered a disorder. Here is one of many studies: The relation of ABO blood types to obsessional personality traits, as measured by the Leyton Obsessional Inventory (LOI), was studied in a sample of 600 normal individuals. High scorers of the LOI trait portion demonstrated a significantly lower incidence of phenotype O and a significantly higher incidence of phenotypes AB, A and B, taken together, compared to those of a general population sample and the entire study group. Findings of the present study, in conjunction with previous … Continue reading Blood type A and OCD