Table 3.

Univariate analysis of factors potentially related to 30-day readmission after non-ruptured AAA repair in 2481 Medicare beneficiaries.

Factor	# of Patients with Factor Present	% Readmitted if Factor Present	% Readmitted if Factor Absent	P
Age				<0.023
65–74	1007	11.0	n/a
75–84	1246	14.1	n/a
≥85	228	16.7	n/a
Gender				0.048
Male	1887	12.4	n/a
Female	594	15.5	n/a
Race				0.99
White	2340	13.1	n/a
Black	83	13.3	n/a
Other	58	13.8	n/a
Reason for Medicare entitlement				0.50
Age	2225	13.4	n/a
Disability	254	11.0	n/a
End-stage renal disease	^†	0	n/a
Medicaid enrollment	192	13.0	13.1	0.95
Charlson comorbidity score				<0.001
1^st tertile	1372	10.5	n/a
2^nd tertile	568	13.9	n/a
3^rd tertile	541	18.9	n/a
Comorbid conditions (Elixhauser codes)
Paralysis	44	25.0	12.9	0.018
Other neurologic disease	150	19.3	12.7	0.020
Anemia	509	18.9	11.6	<0.001
Congestive heart failure	441	18.4	12.0	<0.001
Renal failure	230	17.8	12.6	0.026
Obesity	80	17.5	13.0	0.24
Coagulation disorder	138	17.4	12.9	0.12
History of cancer	428	16.4	12.4	0.028
Hypothyroidism	297	16.5	12.6	0.064
Diabetes mellitus	565	15.4	12.4	0.065
Chronic pulmonary disease	1023	14.9	11.9	0.030
Valvular disease	630	14.3	12.7	0.31
Hypertension	1982	13.3	12.2	0.52
Weight loss	143	15.4	13.0	0.40
Depression	138	14.5	13.0	0.62
Peripheral vascular disease	2380	12.9	16.8	0.26
Fluid or electrolyte disorder	321	16.8	12.6	0.034
Other comorbidity	494	14.4	12.8	0.35
Patient area of residence				0.34
Urban	1487	13.9	n/a
Suburban	256	14.8	n/a
Large town	362	11.3	n/a
Small town or rural	363	10.7	n/a
Missing	13	7.7	n/a
Underwent procedure at high volume hospital	1102	14.0	12.4	0.25
Had in-hospital complication
Any complication	724	17.4	11.3	<0.001
Wound	31	35.5	12.8	<0.001
Reoperation (for non-vascular complications)	20	25.0	13.0	0.11
Renal/Urologic	77	26.0	12.7	0.001
Vascular/graft-related	164	20.1	12.6	0.006
Cardiac	117	20.5	12.7	0.015
Respiratory	254	17.3	12.6	0.035
Hemorrhage/shock	245	16.3	12.8	0.12
Neurologic	68	16.2	13.1	0.45
Venous thromboembolism	12	8.3	13.1	0.62
Prolonged length of stay (>7d)	601	19.1	11.2	<0.001
Discharge destination				<0.001
Home	1754	9.9	n/a
Home with home care	381	16.8	n/a
Skilled nursing facility	223	27.4	n/a
Other facility	123	21.1	n/a
Procedure type				0.69
Endovascular	1502	13.3	n/a
Open	979	12.8	n/a
30-day mortality^*	16	62.5	12.8	<0.001
One-year mortality^*	173	43.9	10.8	<0.001

Mortality outcome variables only include deaths that occurred after discharge and exclude deaths that occurred during the index/surgical hospital stay.

^†

Exact cell size suppressed per data use agreement to protect patient confidentiality as n < 11.