BACKGROUND: The objectives of this study are to investigate the impact of cytomegalovirus (CMV) donor (D)/recipient (R) serostatus on kidney transplant outcomes in recipients who received CMV prophylaxis and to investigate the association of individual antiviral agents (acyclovir, ganciclovir, and valganciclovir) with outcomes in high-risk recipients (D+/R-). METHODS: By using the Organ Procurement and Transplant Network/United Network for Organ Sharing database, 25,058 deceased donor kidney recipients (≥ 18 years, 2004-2008) who received CMV prophylaxis were stratified into four groups: D+/R+ (11,875), D-/R+ (6046), D+/R- (4555), and D-/R- (2582). The impact of CMV D/R serostatus on acute rejection (6 months and 1 year posttransplant) and long-term outcomes of death-censored graft failure and mortality were compared. The impact of the individual antiviral agent on long-term outcome was further evaluated in the high-risk group (D+/R-). RESULTS: In multivariate analysis, CMV D/R status was not associated with acute rejection. Compared with D-/R-, D+/R- was associated with an increased risk for death-censored graft failure (hazard ratio=1.28, P=0.01), all-cause mortality(hazard ratio=1.36, P=0.003), and mortality because of viral infection (hazard ratio=8.36, P=0.04). In the D+/R- group, valganciclovir usage was associated with a decreased risk for death-censored graft failure (hazard ratio=0.65, P=0.007) and mortality because of viral infection (hazard ratio=0.22, P=0.03) compared with ganciclovir usage. CONCLUSIONS: CMV mismatch (D+/R-) was no longer a risk factor for acute rejection in kidney recipients who received antiviral prophylaxis but was still an independent risk factor for death-censored graft failure, all-cause mortality, and viral infection-related mortality.
BACKGROUND: The objectives of this study are to investigate the impact of cytomegalovirus (CMV) donor (D)/recipient (R) serostatus on kidney transplant outcomes in recipients who received CMV prophylaxis and to investigate the association of individual antiviral agents (acyclovir, ganciclovir, and valganciclovir) with outcomes in high-risk recipients (D+/R-). METHODS: By using the Organ Procurement and Transplant Network/United Network for Organ Sharing database, 25,058 deceased donor kidney recipients (≥ 18 years, 2004-2008) who received CMV prophylaxis were stratified into four groups: D+/R+ (11,875), D-/R+ (6046), D+/R- (4555), and D-/R- (2582). The impact of CMV D/R serostatus on acute rejection (6 months and 1 year posttransplant) and long-term outcomes of death-censored graft failure and mortality were compared. The impact of the individual antiviral agent on long-term outcome was further evaluated in the high-risk group (D+/R-). RESULTS: In multivariate analysis, CMV D/R status was not associated with acute rejection. Compared with D-/R-, D+/R- was associated with an increased risk for death-censored graft failure (hazard ratio=1.28, P=0.01), all-cause mortality(hazard ratio=1.36, P=0.003), and mortality because of viral infection (hazard ratio=8.36, P=0.04). In the D+/R- group, valganciclovir usage was associated with a decreased risk for death-censored graft failure (hazard ratio=0.65, P=0.007) and mortality because of viral infection (hazard ratio=0.22, P=0.03) compared with ganciclovir usage. CONCLUSIONS: CMV mismatch (D+/R-) was no longer a risk factor for acute rejection in kidney recipients who received antiviral prophylaxis but was still an independent risk factor for death-censored graft failure, all-cause mortality, and viral infection-related mortality.
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