15 March 2016 : Original article
A Single-Center Comparison of 22 Competing Definitions of Delayed Graft Function After Kidney TransplantationPhilippe DecruyenaereABCDEF, Alexander DecruyenaereABCDEF, Patrick PeetersADE, Frank VermassenADE
Ann Transplant 2016; 21:152-159
BACKGROUND: This study compared 22 different definitions of delayed graft function (DGF) following kidney transplantation.
MATERIAL AND METHODS: Our study included 497 kidney transplantations from deceased donors at our center between 2005 and 2011. Graft survival analysis including log-rank tests and Cox proportional hazards model was performed. Sensitivity and specificity were calculated in relation to graft failure.
RESULTS: Mean follow-up time was 5.1 years. All dialysis-based definitions were associated with graft failure and characterized by high specificity (88–97%), but low sensitivity (25–29%). Hazard ratios ranged from 2.87 to 13.73, with increased risk when dialysis was required earlier and more frequently. The urine output-based definition performed similarly, with an association with graft failure and high specificity (96%), but low sensitivity (21%). Serum creatinine-based definitions were more heterogeneous. Higher sensitivity (4–67%) was found in some of these definitions, but was often associated with lower specificity (47–96%), losing the association with graft failure. Definitions combining different criteria varied in sensitivity (17–62%) and specificity (60–96%). However, some were able to achieve higher sensitivity without compromising too much on specificity, while keeping the association with graft failure.
CONCLUSIONS: Our results indicate a potential advantage of combined definitions, because they are able to detect a larger group of recipients with increased risk of graft failure.
Keywords: Delayed Graft Function, Graft Survival, Kidney Transplantation
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