Table 3.

Predictors of post-transplant length of stay among patients who underwent liver transplant in the United States 2008–17

	Univariable			Multivariable †
	IRR	95% CI	p-value	aIRR	95% CI	p-value
Female gender	1.09	1.06–1.12	<0.001	1.04	1.01–1.07	0.007
Age (at transplant) per year	1.01	1.00–1.01	<0.001	1.01	1.00–1.01	<0.001
Race
White	Ref	0.91–0.99	0.013
Black	0.95	1.12–1.23	<0.001
Hispanic	1.17	0.99–1.18	0.08
Asian	1.08
Nonwhite race	1.07	1.04–1.11	<0.001
Body mass index	1.00	0.99–1.00	0.001	0.99	0.99–1.00	<0.001
Diabetes	1.04	1.01–1.08	0.02
Liver diagnosis
Alcohol	Ref	0.96–1.03	0.76
Hepatitis C	0.99	0.97–1.07	0.49
NASH	1.02	0.92–1.03	0.28
Cryptogenic	0.97	0.94–1.23	0.31
Hepatitis B	1.07	0.87–0.96	<0.001
Autoimmune/cholestatic	0.91
Prior transplant	1.22	1.11–1.34	<0.001	1.21	1.10–1.33	<0.001
Days on waitlist	1.00	1.00–1.00	0.28
Insurance
Private	Ref	1.09–1.18	<0.001	Ref	1.03–1.11	0.001
Medicaid	1.14	1.10–1.18	<0.001	1.07	1.05–1.12	<0.001
Medicare	1.14			1.09
MELDNa at transplant per point	1.03	1.03–1.03	<0.001	1.01	1.01–1.01	<0.001
Albumin at transplant per point	1.13	1.10–1.16	<0.001
Hepatic encephalopathy	1.25	1.22–1.28	<0.001	1.09	1.07–1.12	<0.001
Ascites	1.08	1.03–1.13	0.002	0.90	0.85–0.94	<0.001
Dialysis at transplant	1.64	1.59–1.70	<0.001
Life support at transplant	2.08	1.99–2.18	<0.001	1.57	1.50–165	<0.001
Portal vein thrombus at transplant	1.08	1.03–1.13	0.001	1.07	1.02–1.11	0.002
KPS category prior to transplant
80 or more
50–70	Ref			Ref
40 or less	1.10	1.71–1.87	<0.001	1.04	1.00–1.09	0.07
	1.79	1.71–1.87	<0.001	1.37	1.31–1.44	<0.001
Hospitalization pre-transplant	1.72	1.67–1.77	<0.001	1.21	1.16–1.26	<0.001
Transplant from ICU	1.93	1.86–2.00	<0.001	1.24	1.18–1.29	<0.001
Donor risk index per point	0.95	0.92–0.99	0.006	1.04	1.01–1.08	0.05

^†Adjusted for year and region

Incidence rate ratio (IRR); confidence interval (CI); Nonalcoholic steatohepatitis (NASH); Model for End-Stage Liver Disease with Sodium (MELDNa); Karnofsky Performance Score (KPS); intensive care unit (ICU).