# The Survival Rate of Living-Donor Liver Transplantation Between Same-Sex and Opposite-Sex Recipients

## TL;DR

This study examines how donor and recipient sex pairings affect survival rates in living-donor liver transplants.

## Contribution

The study provides new empirical insights into the impact of same-sex versus opposite-sex donor-recipient pairings on LDLT outcomes.

## Key findings

- Same-sex donor-recipient pairs had higher liver weight and graft-to-recipient weight ratios.
- Disease diagnoses varied significantly between same-sex and opposite-sex pairs.
- Same-sex pair survival rates were higher but not statistically significant.

## Abstract

Purpose: Living-donor liver transplantation (LDLT) serves as a solution for patients facing end-stage liver disease. The existing literature indicates that sex differences between transplant donors and recipients might influence survival rates. Methods: We used a retrospective study design to investigate the impact of different sex pairings on the survival rates of adult LDLT recipients. This study involved the long-term tracking of recipients who underwent LDLT between 7 June 2000 and 31 December 2021. Results: In total, 169 pairs (37.1%) of male recipients with male donors, 145 pairs (31.8%) of male recipients with female donors, 77 pairs (16.9%) of female recipients with female donors, and 65 pairs (14.3%) of female recipients with male donors were submitted for analysis. With independent t-tests or chi-squared tests demonstrating that liver weight and graft-to-recipient weight ratio (GRWR) for same-sex LDLT recipients were significantly higher than opposite-sex recipients; significant differences in disease diagnoses between same-sex and opposite-sex LDLT recipients were found. The Kaplan–Meier survival curve indicates that while same-sex pair survival rates were higher than opposite-sex pairs, the difference was not statistically significant. Conclusions: While sex matching might have some impact on survival rates, it is influenced by a variety of factors, so the effects of donor and recipient sex matching on liver transplantation remains controversial. The findings of this study can serve as a reference for living-donor liver transplant teams when making donor selection decisions.