Fig. 5: Comparison of 1-year graft survival estimate.
From: Transplantation of discarded livers following viability testing with normothermic machine perfusion
Conditional logistic regression was carried out on the matched case–control data to determine the relative risk for graft survival at 1 year between matched case–control groups. The median (range) days follow-up data were included in the survival analyses, but the plot was truncated at 12 months. The ticks on the top of each Kaplan–Meier curve relate to the numbers of patients being censored at that particular time point. There are 2 cases of graft failure in the perfusion group at days 119 and 209; the control group contains 5 graft failures (2 at day 5, 1 at day 14, 1 at day 165 and 1 at day 182). The graft survival was similar in both groups. Findings showed that the odds ratio (relative risk) estimate for graft survival at 6 months was determined as 2.0 (95% CI: 0.2–17.9; p = 0.535). Due to the small sample sizes and that this statistical comparison test was not powered,these results should be interpreted with caution.
