Table 5.

Complications during the Index Surgical Admission

Variable	Total Patients (n=58231)		Patients Without Readmission (n=53522)		Patients with Readmission (n=4709)		Odds Ratio	99% CI
	#	(%)	#	(%)	#	(%)
Admission Route
Routine	43944	75.5	40899	76.4	3045	64.7	1 (Ref)
Other hospital	3075	5.3	2767	5.2	308	6.5	1.85	1.69–2.02
Emergency Room	11212	19.3	9856	18.4	1356	28.8	1.5	1.27–1.76
Hemorrhage/Seroma
Yes	1727	3.0	1529	2.9	198	4.2	1.49	1.22–1.82
Wound Dehiscence/Fistula
Yes	424	0.7	343	0.6	81	1.7	2.72	1.97–3.74
SSI
Yes	1968	3.4	1771	3.3	197	4.2	1.28	1.05–1.56
CNS Complication
Yes	307	0.5	257	0.5	50	1.1	2.23	1.49–3.32
Cardiac Complication
Yes	4013	6.9	3383	6.3	630	13.4	2.29	2.03–2.58
Pulm Complication
Yes	3450	5.9	2751	5.1	699	14.8	3.22	2.86–3.62
VTE
Yes	367	0.6	260	0.5	107	2.3	4.74	3.53–6.42
AKI
Yes	975	1.7	718	1.3	257	5.5	4.25	3.51–5.14
UTI
Yes	1023	1.8	784	1.5	239	5.1	3.60	2.96–4.37
Sepsis/Septicemia
Yes	867	1.5	645	1.2	222	4.7	4.06	3.30–4.98
# of Index Complications
0	47447	81.5	44378	82.9	3069	65.2	1 (Ref)	NA
1	7925	13.6	6912	12.9	1013	21.5	2.12	1.92–2.34
>=2	2859	4.9	2232	4.2	627	13.3	4.06	3.58–4.61
Type of Complication
None	47447	81.5	44378	82.9	3069	65.2	1 (Ref)	NA
Surgical only	2807	4.8	2571	4.8	236	5.0	1.33	1.11–1.59
Medical only	6860	11.8	5656	10.6	1204	25.6	3.08	2.8–3.38
Medical and surgical complication	1117	1.9	917	1.7	200	4.2	3.15	2.57–3.88
Index LOS
<=3days	43463	74.6	41181	76.9	2282	48.5	1 (Ref)	NA
4–7 days	7805	13.4	6932	13.0	873	18.5	2.27	2.04–2.53
8–14	3849	6.6	3089	5.8	760	16.1	4.44	3.95–5.00
15–30	2068	3.6	1565	2.9	503	10.7	5.80	5.03–6.69
>=31	1046	1.8	755	1.4	291	6.2	6.96	5.77–8.38
Discharge Destination
Home	52017	89.3	48651	90.9	3366	71.5	1 (Ref)	NA
Home with care	3680	6.3	2925	5.5	755	16.0	3.73	3.42–4.07
Nursing facility	2534	4.4	1946	3.6	588	12.5	4.37	3.96–4.82

Abbreviations: SSI = surgical site infection; CNS = central nervous system; pulm = pulmonary; VTE = venous thromboembolism; AKI = acute kidney injury; UTI = urinary tract infection; LOS = length of stay