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Depression and blood types.

S Singg1, J L Lewis

  • 1Department of Psychology and Sociology, Angelo State University, P.O. Box 10907, San Angelo, TX 76909, USA. Sangeeta.Singg@angelo.edu

Psychological Reports
|August 18, 2001
PubMed
Summary

Depression may be linked to blood Type O, even in individuals without hospitalization. This study observed the association in normal volunteers, suggesting a broader connection between blood type and depressive symptoms.

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Area of Science:

  • Psychiatry
  • Hematology
  • Psychology

Background:

  • Previous research suggests a correlation between depression and blood Type O in hospitalized patients.
  • The potential link between blood type and mental health conditions warrants further investigation in diverse populations.

Purpose of the Study:

  • To investigate the association between blood Type O and depression in a non-hospitalized, normal volunteer population.
  • To determine if the depression-blood Type O association observed in clinical settings is present in the general population.

Main Methods:

  • 108 normal volunteers were recruited and categorized by ABO blood group (Type O, Type A, and Type B/AB).
  • Participants completed the Beck Depression Inventory (BDI) to assess depressive symptom severity.

Main Results:

  • A statistically significant association was observed between blood Type O and higher scores on the Beck Depression Inventory.
  • This association was consistent with findings from studies involving hospitalized patient populations.

Conclusions:

  • The findings suggest that blood Type O may be associated with an increased risk or manifestation of depressive symptoms, even in individuals without a formal diagnosis of depression or hospitalization.
  • Further research is recommended to explore the underlying biological or psychological mechanisms connecting blood Type O and depression.

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