Pretransplant Midodrine Use: A Newly Identified Risk Marker for Complications after Kidney Transplantation.

Background: Midodrine is prescribed to prevent symptomatic hypotension and decrease complications associated with hypotension during dialysis. We hypothesized that midodrine use before kidney transplantation may be a novel marker for posttransplant risk. Methods: We analyzed integrated national US transplant registry, pharmacy records, and Medicare claims data for 16 308 kidney transplant recipients transplanted 2006 to 2008, of whom 308 (1.9%) had filled midodrine prescriptions in the year before transplantation. Delayed graft function (DGF), graft failure, and patient death were ascertained from the registry. Posttransplant cardiovascular complications were identified using diagnosis codes on Medicare billing claims. Adjusted associations of pretransplant midodrine use with complications at 3 and 12 months posttransplant were quantified by multivariate Cox or logistic regression, including propensity for midodrine exposure. Results: At 3 months, patients who used midodrine pretransplant had significantly (P

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