Survival after blood transfusion.

Area of Science:

• Hematology
• Public Health
• Epidemiology

Background:

• Long-term survival rates for blood transfusion recipients are not well-established.
• Previous studies have not extensively examined mortality patterns over extended periods post-transfusion.

Purpose of the Study:

• To investigate short- and long-term mortality rates among blood transfusion recipients.
• To compare mortality in transfusion recipients to the general population using standardized mortality ratios (SMR).

Main Methods:

• A population-based cohort study was conducted in Denmark and Sweden.
• Over 1.1 million transfusion recipients were followed for up to 20 years after their first blood transfusion.
• All-cause mortality was the primary outcome measure.

Main Results:

• Post-transfusion survival rates at 1, 5, and 20 years were 73.7%, 53.4%, and 27.0%, respectively.
• The standardized mortality ratio (SMR) was 17.6 times higher in the first 3 months post-transfusion and remained elevated (1.3-fold) even after 17 years.
• Survival varied by sex, age, and the clinical department where transfusion occurred, with internal medicine showing the worst outcomes.

Conclusions:

• This study provides detailed insights into the survival and mortality patterns of blood transfusion recipients.
• Findings are crucial for assessing risks associated with potential transfusion-transmitted diseases.
• Results aid in cost-benefit analyses for new blood safety interventions.