Introduction: Living-donor liver transplant (LDLT) donors have been reported to experience various psychological problems. A number of case reports have investigated the relationship between the physical status of recipients and the psychological and physical perceptions of donors. The aim of this study is to statistically clarify this phenomenon. Methods: In this cross-sectional study, 167 persons who underwent a pediatric LDLT donor operation from 1 to 10 years ago were surveyed with Short Form-36 (SF-36), a self-administered evaluation scale for quality of life. Information about recipient outcomes was gathered for the 117 participants from whom valid responses were received, and the presence of any relationships were investigated. Results: The donor was the recipient’s mother in 50.4% of cases and the recipient’s father in 46.2% of cases. In 76.9% of cases, the recipient progressed favorably; in 19.7% of cases, postoperative complications occurred; and in 3.4% of cases, the recipient died. The mean scores for all of the eight sub-items of SF-36 (physical-functioning, role-physical, bodily-pain, general-health-perception, vitality, social-functioning, role-emotional, and mental-health) were all better than national averages. However, general-health-perception, a scale for physical health, was lower in cases where the recipient developed postoperative complications, and mental-health was lower for cases where the recipient died (p < 0.05, Steel-Dwass method). Conclusions: The results suggested that donors experience the recipient’s poor physical condition as their own (the ‘Siamese-twin’ effect). Furthermore, it seems that psychosomatic problems may develop in response to poor outcomes in recipients, indicating the necessity of offering mental support.
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