Table 1

Demographic and clinical variables for women with and without congenital heart disease admitted to a US hospital for delivery, 1998–2007

	Congenital heart disease				p Value
	Yes		No
		SEM		SEM
Age, years	27.3	0.13	27.4	0.06	0.22
Age categories (%)					0.42
<18 years	4.1	0.3	3.9	0.1
18−34 years	81.9	0.6	81.7	0.2
≥35 years	14.0	0.5	14.4	0.2
Comorbidites, n (%)					<0.0001
0	79.6	0.7	88.0	0.2
1	17.3	0.6	10.5	0.2
2	2.7	0.2	1.2	0.04
3+	0.5	0.1	0.2	0.01
Teaching hospital, %	60.1	1.9	46.5	1.2	<0.0001
Caesarean section, %	32.2	0.7	26.5	0.2	<0.0001
Length of stay, days	3.5	0.07	2.6	0.01	<0.0001
Length of stay >3 days, %	23.8	0.7	13.4	0.2	<0.0001
Insurance, %^*					<0.0001
Private	57.6	1.2	55.1	0.8
Medicaid	36.3	11	38.3	0.7
Medicare	0.9	0.1	0.5	0.03
Self-pay	2.6	0.3	3.6	0.3
Total charges, $	11 515	377	8006	121	<0.0001
Total charges >$15 000, (%)	14.5	0.9	8.1	0.4	<0.0001

↵* Insurance types do not add to 100% given the small number of patients with other types of insurance or who were not charged.