Table 3.

Patient Demographics

Variable	Total Patients (n=58231)		Patients Without Readmission (n=53522)		Patients with Readmission (n=4709)		Odds Ratio	99% CI
	#	(%)	#	(%)	#	(%)
Age categories
<45	18018	30.9	16883	31.5	1135	24.1	1 (Ref)
45–54	12078	20.7	11183	20.9	895	19.0	1.19	1.06–1.34
55–64	12116	20.8	11130	20.8	986	20.9	1.32	1.17–1.48
65–74	8936	15.3	8139	15.2	797	16.9	1.46	1.29–1.65
>=75	7083	12.2	6187	11.6	896	19.0	2.15	1.91–2.43
Sex
Female	32143	55.2	29812	55.7	2331	49.5	1 (Ref)
Male	26088	44.8	23710	44.3	2378	50.5	1.28	1.19–1.39
Race
White	33536	57.6	30833	57.6	2703	57.4	1 (Ref)
Black	4449	7.6	4001	7.5	448	9.5	1.78	1.11–1.47
Hispanic	10840	18.6	9866	18.4	974	20.7	1.13	1.02–1.25
Asian	4204	7.2	3844	7.2	360	7.6	1.07	0.92–1.24
Other	1064	1.8	979	1.8	85	1.8	0.99	0.74–1.33
Missing race	4138	7.1	3999	7.5	139	3.0	0.40	0.32–0.50
Median household income of ZIP (quartiles)
4 (lowest)	12801	22.0	11642	21.8	1159	24.6	1 (Ref)
3	14081	24.2	12932	24.2	1149	24.4	0.89	0.80–1.00
2	14741	25.3	13559	25.3	1182	25.1	0.88	0.78–0.98
1 (highest)	15603	26.8	14464	27.0	1139	24.2	0.79	0.71–0.89
Missing	1005	1.7	925	1.7	80	1.7	0.87	0.64–1.19
Insurance
Private	28499	48.9	26763	50.0	1736	36.9	1 (Ref)	NA
Medicaid	5868	10.1	5167	9.7	701	14.9	1.98	1.81–2.17
Medicare	16866	29.0	14945	27.9	1921	40.8	2.09	1.85–2.36
Self-pay	2781	4.8	2657	5.0	124	2.6	0.72	0.56–0.92
Other	4217	7.2	3990	7.5	227	4.8	0.88	0.73–1.06

Abbreviations: CI = confidence interval; Ref = reference