Obsessional Personality Traits and ABO Blood Types

Abstract

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 0 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 findings concerning a lower incidence of phenotype 0 and a higher incidence of phenotype A in obsessive compulsive patients, could be interpreted as indicating that phenotype·may be associated with personality traits hindering the development of obsessive-compulsive symptomatology.

Influence of ABO Blood Type on Symptomatology among Outpatients: Study and Replication

“…'Trouble remembering things'). The results show that symptoms broadly defined as obsessive-compulsive are less severe in patients with blood type O than blood type A, consistent with the three studies by Rinieris and co workers [Rinieris et al, 1978[Rinieris et al, . 1980[Rinieris et al, .…”

“…In two studies of Greek patients with obsessivecompulsive disorder Rinieris and co-workers find the frequency of blood type O is significantly lower, and that of blood type A is significantly higher, than in the general population [Rinieris et al" 1978[Rinieris et al" , 1983. They also report that blood type O occurs significantly less often than expected among normal persons with obsessional per sonality traits, while blood type A is more common than expected, although not significantly [Rinieris et al" 1980], They suggest that blood type O is associated with factors which protect against the development of obses sive-compulsive symptoms. On the other hand, a study of British patients with obsessive-compulsive disorder reports no difference in the distribution of blood types between patients and controls [McKcon and McColl.…”

“…Blood type O occurs more often than expected in bipolar illness [Mendlewicz et al, 1974;Parker et al, 1961;Shapiro et al, 1977] and less often in both obsessive-compulsive disorder [Rinieris et al, 1978[Rinieris et al, , 1983 and in individuals with obsessive-compulsive traits [Rinieris et al, 1980], Not all studies find differences according to blood group, however [McKeon and McColl, 1982], A problem with many of these studies is that a large number of statistical tests are performed on data from a single patient sample, which may produce a significant finding by chance. Another problem is that diagnostic criteria often vary between studies, so the results are hard to compare.…”

An update on susceptibility of individuals to diseases based on ABO blood groups

“…There are many studies that proved the association between blood groups and personality traits. Obsessional personality traits were analyzed among 600 individuals, and the results showed high incidence of A type and low incidence of O in obsessive compulsive patients (Rinieris et al, 1980). A similar analysis was recently performed in Iran that failed tofind any significant relationship between blood types and personality traits (Dibajnia et al, 2014).…”

Association of psycho-wellness with various blood types in young medical students

“…The researchers determined that blood group O might be associated with personality traits hindering the development of obsessive-compulsive symptomology. 25 Marutham et al found blood type B individuals to have higher neuroticism scores compared to blood types O and A on the Eysenck Personality Inventory. 26 The present study results resembles to Boyer, Neumann et al, Rinieris et al, Marutham et al, in contrast to Singg S et al blood group O least affected to suicidal tendency.…”