Limitations
This investigation is limited by the retrospective nature, as well as small sample size of PTx and KPTx recipients specific to CABG. Given the small proportion of the population who undergo transplantation in general, this is a common theme within transplant literature. The lack of in-hospital mortality for PTx and KPTx limited our ability to compare trends in similar research. NIS data lacks detailed information about costs during hospital stay, so the reason for increased costs in PTx recipients cannot be determined. Additionally, NIS data does not permit longitudinal follow-up to evaluate subsequent readmissions or hospitalizations on patient or graft outcomes. Finally, the database does not include patient creatinine, GFR, or immunosuppressive regimens, which may influence perioperative risk.