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Edgren's bias


Edgren's bias is an error that occurs in research of blood transfusion or organ transplantation transmitted disorders. It occurs when the researcher fails to realize that the donor and recipient are the same person (i.e. that it was an autologous donation) and results in erroneous correlation in the disease occurrence between donors and recipient. It can easily be resolved by making sure that the donor and recipient are not the same person. It can be seen as a variant of selection bias.




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