Mortality after transfusions, relation to donor sex.

Area of Science:

• Transfusion Medicine
• Immunology
• Clinical Outcomes Research

Background:

• Blood products from female donors have been linked to poorer outcomes post-transfusion.
• Previous associations suggest a potential impact of donor sex on transfusion recipient mortality.

Purpose of the Study:

• To quantify the association between transfusions from female donors and overall mortality.
• To investigate sex-specific effects of donor sex on recipient outcomes.

Main Methods:

• A cohort study was conducted on transfusion recipients over a 5-year period.
• Analyses focused on recipients receiving transfusions exclusively from same-sex donors.
• Effects were analyzed separately for male and female recipients to determine sex-specific risks.

Main Results:

• Overall, transfusions from female donors were not associated with increased mortality when averaged across sexes.
• Male recipients transfused with blood from female donors showed a positive association with mortality.
• Female recipients transfused with blood from male donors exhibited a reversed association, with a weaker increase in mortality.

Conclusions:

• Transfusions from female donors are not linked to increased overall mortality.
• Male recipients are at an increased risk of death when transfused with blood from female donors.
• Female recipients of blood from male donors experienced a less pronounced increase in mortality.