Acute Rejection Is a Strong Negative Predictor of Graft Survival in Living-Donor Pediatric Renal Transplant: 10-Year Follow-Up in a Single Mexican Center.

OBJECTIVES: Kidney transplant is the optimal treatment for children with end-stage renal disease. Multiple factors affect patient and graft survival. We assessed determinants of long-term patient/graft survival in our center by a retrospective review of pediatric living donor (< 18 years) kidney transplants from February 2003 to December 2016. MATERIALS AND METHODS: Donor and recipient demo-graphic data and immunosuppression use were gathered for analyses. Transplant outcomes included patient/graft survival, acute rejection, and 1-year estimated glomerular filtration rate. Patient/graft survival results were analyzed by Kaplan-Meier, and Cox proportional hazards regression model was used for risk factors (univariate/multivariate). P ≤ .05 was statistically significant. RESULTS: Ninety-nine patients were included. Age was 13.4 ± 3.08 years, 64.6% were male, and 88.9% were on dialysis with time of 17.1 ± 12.6 months. Mean donor age was 36.6 ± 7.7 years, and most were females (63.6%). Donor estimated glomerular filtration rate was 89.4 ± 16.9 mL/min/1.73 m2. HLA match was 3.2 ± 1.05. Panel reactive antibody showed 8.6 ± 20.5%. Of total patients, 47.5% used induction, 88.9% used cyclo-sporine, and 100% used mycophenolate mofetil. Five- and 10-year patient survival rates were 93.2% and 93.2%. One-year acute rejection was 14.1%, with rate of 24.2% throughout follow-up. One-year estimated glomerular filtration rate was 76.4 ± 25.6 mL/min/1.73 m2. Five- and 10-year graft survival rates were 62.6% and 43.3%. Multivariate analysis confirmed donor age and acute rejection episodes throughout follow-up as risk factors for graft survival (P < .05). CONCLUSIONS: Acute rejection and donor age are important risk factors for 10-year graft survival in living-donor pediatric kidney transplant in our program.

Patient survival scale after kidney transplant from deceased donors in Veracruz, Mexico / Escala de sobrevida de pacientes después de trasplante renal de donantes fallecidos en Veracruz, México

Background: The Estimated Post Transplant Survival (EPTS) score is calculated based on age, the presence of diabetes mellitus, years on dialysis, and prior organ transplant. The EPTS score has been validated in other countries. Objective: To apply and assess the EPTS score in our population of deceased-donor kidney transplants. Materials and methods: Retrospective study of adult deceased-donor kidney transplants from January, 2003, to December, 2016. For the statistical analysis it was used Spearman's correlation, receiver-operator curves (ROC) and Kaplan-Meier curves. A p value < 0.05 was considered statistically significant. Results: 176 adult deceased-donor kidney transplants were included. Medium age was 34.7 ± 11 years; 53.4% were men, 4% diabetics; mean dialysis time was 5.5 ± 3.9 years and 4% had a prior organ transplant. The medium of EPTS score was 16.3 ± 18.7 (1 94). Spearman's correlation was −0.394 (p = 0.0001). C value (ROC) was 0.64 ± 0.6 (95% CI, 0.52-0.75) (p = 0.011). Medium survival calculated with Kaplan-Meier in patients with an EPTS score < 20, was 10.2 ± 0.3 years (95% CI, 9.5-10.9) versus patients with EPTS score > 20: 7.03 ± 0.9 years (95% CI, 5.1-8.9) (p = 0.001). Each 20% increase of EPTS, patient survival time diminished (p = 0.0001). Conclusions: The EPTS score is a useful tool for establishing survival in adult Mexican recipients of deceased-donor kidney transplants.

Introducción: la escala de sobrevida estimada postrasplante (EPTS) se calcula a partir de la edad, la presencia de diabetes mellitus, el tiempo en diálisis y el trasplante previo. La EPTS ha sido previamente validada en otros sitios. Objetivo: aplicar y evaluar la escala EPTS en nuestra población de trasplantes de donante fallecido. Material y métodos: estudio retrospectivo de trasplantes renales de donantes adultos fallecidos, llevados a cabo entre enero de 2003 y diciembre de 2016. Para el análisis estadístico se utilizaron correlación de Spearman, curvas de ROC y Kaplan-Meier y se consideró significativa una p < 0.05. Resultados: se incluyeron 176 trasplantes de donantes adultos fallecidos; 53.4% fueron hombres, 4% diabéticos; la edad media fue de 34.7 ± 11 años; el tiempo medio en diálisis fue de 5.5 ± 3.9 años y 4% tuvo trasplante previo. La media de la escala EPTS fue de 16.3 ± 18.7 (rango 1-94). La correlación Spearman fue −0.394 (p = 0.0001). El valor C de la curva ROC fue de 0.64 ± 0.6 (IC 95% 0.52-0.75) (p = 0.011). La supervivencia media calculada con Kaplan-Meier en pacientes con EPTS < 20 fue 10.2 ± 0.3 años (IC 95% 9.5-10.9) frente a los pacientes con EPTS > 20: 7.03 ± 0.9 años (IC 95% 5.1-8.9) (p = 0.001). Por cada 20% que se incrementó la EPTS, la supervivencia del paciente fue menor (p = 0.0001). Conclusiones: la escala EPTS es una buena herramienta para establecer la supervivencia en pacientes adultos mexicanos receptores de trasplante renal de donante fallecido.