Table 1

Characteristics of study sample for uncomplicated vaginal deliveries (diagnosis-related group 775)

	N	Percent
Patient-level characteristics (n=76 766)
Age categories
18–34	60 175	78.39
35–64	16 591	21.61
Sex
Male	0	0.00
Female	76 766	100.00
Private insurance type
Managed Care-Knox Keene	34 387	44.79
Managed care-other	36 414	47.44
Traditional coverage	5965	7.77
Charlson comorbidity index
0	75 182	97.94
1	1555	2.03
2	29	0.03
Length of stay
Less than 3 days	59 724	77.80
3–6 days	16 826	21.92
Greater than 6 days	216	0.28
Hospital-level characteristics (n=198)
Ownership
Government	32	16.16
NFP	127	64.14
FP	39	19.70
Location
Urban	174	87.88
Rural	24	12.12
Teaching status
Yes	20	10.10
No	178	89.90

	N	Mean	SD

Casemix (severity)
Low	66	1.28	0.12
Medium	66	1.55	0.05
High	66	1.78	0.13
Capacity
Licensed beds	198	280.45	180.36
Payer mix
% Medicare	198	37.79	12.38
% Medicaid	198	28.13	15.68
Market-level characteristics
Wage index
Low	121	1.19	0.00
Medium	12	1.22	0.01
High	65	1.48	0.14
Herfindahl-Hirschman Index
Low	67	1178	629
Medium	70	3351	721
High	61	6831	1986
% Without insurance	198	18.31	3.77
% Below poverty line	198	13.80	4.41