The Influence of Race and Common Genetic Variations on Outcomes After Pediatric Heart Transplantation

D. J. Green, M. M. Brooks, G. J. Burckart, R. E. Chinnock, C. Canter, L. J. Addonizio, D. Bernstein, J. K. Kirklin, D. C. Naftel, D. M. Girnita, A. Zeevi, S. A. Webber

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Significant racial disparity remains in the incidence of unfavorable outcomes following heart transplantation. We sought to determine which pediatric posttransplantation outcomes differ by race and whether these can be explained by recipient demographic, clinical, and genetic attributes. Data were collected for 80 black and 450 nonblack pediatric recipients transplanted at 1 of 6 centers between 1993 and 2008. Genotyping was performed for 20 candidate genes. Average follow-up was 6.25 years. Unadjusted 5-year rates for death (p = 0.001), graft loss (p = 0.015), acute rejection with severe hemodynamic compromise (p = 0.001), late rejection (p = 0.005), and late rejection with hemodynamic compromise (p = 0.004) were significantly higher among blacks compared with nonblacks. Black recipients were more likely to be older at the time of transplantation (p < 0.001), suffer from cardiomyopathy (p = 0.004), and have public insurance (p < 0.001), and were less likely to undergo induction therapy (p = 0.0039). In multivariate regression models adjusting for age, sex, cardiac diagnosis, insurance status, and genetic variations, black race remained a significant risk factor for all the above outcomes. These clinical and genetic variables explained only 8–19% of the excess risk observed for black recipients. We have confirmed racial differences in survival, graft loss, and several rejection outcomes following heart transplantation in children, which could not be fully explained by differences in recipient attributes.

Original languageEnglish
Pages (from-to)1525-1539
Number of pages15
JournalAmerican Journal of Transplantation
Volume17
Issue number6
DOIs
StatePublished - Jun 2017

Keywords

  • clinical research/practice
  • disparities
  • ethnicity/race
  • genetics
  • genetics
  • health services and outcomes research
  • heart transplantation/cardiology
  • patient characteristics
  • pediatrics

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    Green, D. J., Brooks, M. M., Burckart, G. J., Chinnock, R. E., Canter, C., Addonizio, L. J., Bernstein, D., Kirklin, J. K., Naftel, D. C., Girnita, D. M., Zeevi, A., & Webber, S. A. (2017). The Influence of Race and Common Genetic Variations on Outcomes After Pediatric Heart Transplantation. American Journal of Transplantation, 17(6), 1525-1539. https://doi.org/10.1111/ajt.14153