Prospectively enrolled retrospective chart review and Liver Transplant database review to determine the modifiable and nonmodifiable risk factors specifically relating to Living Donor Liver Transplants. To observe the impact of age and BMI on graft outcomes and whether they impact the intraoperative management, post-operative length of stay, and complications.

There has been a great deal of research into the characteristics of the donor for organ transplant, with older donors and those with more comorbidities having worse function once the organ is implanted. There has not been a great deal of research in the United States about the recipient's characteristic including age and BMI and the effects on donor organ function. With increasingly expanded criteria for organ recipients especially in the field of living donor organs the investigators plan to show the impact of older age and increased BMI on newly transplanted organs.

Inclusion Criteria:

• All patients who received a liver transplant at UPMC- Montefiore Hospital Age> 18

Exclusion Criteria:

• Excludes Children (<18 years old) as they do not receive their operation under the same protocols Lost to follow-up prior to 1 year Participation in alternate research protocol that significantly altered the care they received in the perioperative period that may make their inclusion skew results.

Patients with end-stage liver disease, cirrhosis, or cancer requiring a liver transplant.

No current plans