Table 3.

Cox proportional hazard models for mortality among patients undergoing simultaneous liver-kidney transplant versus liver transplant alone by strata defined by renal function and dialysis status

Model	Liver transplant recipients not on dialysis either at listing or transplant, and Scr < 2 mg/dl at transplant (LK1)		Liver transplant recipients not on dialysis either at listing or transplant, and Scr ≥ 2 mg/dl at transplant (LK2)		Liver transplant recipients not on dialysis at listing but on dialysis at transplant (LK3)		Liver transplant recipient on dialysis both at listing and transplant (LK4)
	HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P
Before propensity score matching
Missing data, % (missing/total N)	0.9 (234/26,209)		1.4 (82/5971)		2.5 (63/2551)		1.5 (18/1216)
Unadjusted model	0.83 (0.56–1.22)	0.34	0.83 (0.70–0.99)	0.04	0.92 (0.76–1.13)	0.42	1.04 (0.82–1.32)	0.73
After propensity score matching
Missing data, % (missing/total N)	0.4 (3/680)		1.5 (27/1807)		2.1 (20/962)		2.1 (13/612)
Model adjusted for other covariatesa	0.88 (0.56–1.39)	0.59	0.77 (0.62–0.96)	0.02	0.89 (0.68–1.16)	0.39	0.89 (0.64–1.23)	0.48

CI, confidence interval; HR, hazard ratio; N, sample size; Scr, serum creatinine.

^aOther covariates: ABO type, encephalopathy category, ascites category, estimated slope of creatinine from wait-listing to transplantation (for the LK1 and LK2 groups), hospitalized to ICU before transplant (on mechanical ventilation), and transplant year.