Table 2.

Hazard ratios along with their 95% confidence intervals for the 12 most influential variables for the Cox models. Variables are presented in decreasing order according to the absolute z-score values (12.90 to 5.16) for the Cox model with all variables. Predictors shown are the most prognostic as their z-scores values correspond to low and very significant p-values. These variables were also selected by both Cox backward and Cox LASSO model which verifies their prognostic ability for Cox models

	Cox all variables	Cox backward	Cox LASSO
	HR (95% CI)	HR (95% CI)	HR
Re-transplantation	1.602 (1.491-1.721)	1.608 (1.501-1.722)	1.558
Donor age	1.010 (1.008-1.011)	1.011 (1.009-1.012)	1.009
Donor type DCD (a)	1.483 (1.362-1.616)	1.443 (1.338-1.556)	1.298
log(Total cold ischemic time)	1.258 (1.192-1.327)	1.285 (1.221-1.353)	1.191
Diabetes	1.173 (1.125-1.225)	1.176 (1.128-1.226)	1.136
Race Black (b)	1.240 (1.171, 1.314)	1.261 (1.193-1.332)	1.186
Life support	1.343 (1.240-1.454)	1.375 (1.272-1.487)	1.304
Recipient age	1.007 (1.005-1.009)	1.008 (1.006-1.010)	1.006
Incidental tumour	1.314 (1.202, 1.437)	1.315 (1.203-1.437)	1.203
Hypertensive bleeding	1.296 (1.185, 1.418)	1.301 (1.190-1.423)	1.214
HCV (c) serology status	1.147 (1.091-1.206)	1.148 (1.094-1.205)	1.166
Pre-treatment status ICU (d)	1.240 (1.143, 1.346)	1.253 (1.160-1.354)	1.164

(a): Donor type DCD (Donor Circulatory Dead) vs DBD (Donor after Brain-Dead), (b): Race Black vs White, (c): Chronic hepatitis C virus, (d): Intense Care Unit vs Non-hospitalised/Hospitalised