Table 3

Regression of adjusted charges on hospital and market characteristics for uncomplicated vaginal deliveries

	Multiplicative increase for each unit change in predictor	95% CI lower bound	95% CI upper bound	p Value
Hospital-level characteristics
Ownership
Government	−0.096	−0.249	0.057	0.217
NFP	Reference
FP	0.198	0.0475	0.348	0.010
Teaching status
Yes	−0.049	−0.317	0.22	0.719
No	Reference
Location
Urban	Reference
Rural	0.022	−0.144	0.19	0.849
Casemix (severity)
Low	Reference
Medium	0.104	−0.044	0.252	0.166
High	0.196	0.044	0.349	0.012
Capacity
Licensed beds	0.0003	−0.0001	0.0007	0.234
Payer mix
Proportion medicare	0.263	−0.352	0.878	0.400
Proportion Medicaid	−0.002	−0.442	0.437	0.992
Quality indicators
Caesarean delivery rate	−0.097	−2.407	2.212	0.934
Vaginal birth after caesarean rate (uncomplicated)	0.415	−0.528	1.357	0.386
Primary caesarean delivery rate	0.208	−2.32	2.737	0.871
Market-level characteristics
Wage index
Low	Reference
Medium	0.202	0.0276	0.376	0.023
High	0.409	0.271	0.547	<0.001
Herfindahl-Hirschman Index (system-wide)
Low	Reference
Medium	0.012	−0.116	0.139	0.857
High	0.005	−0.14	0.149	0.951
% Without insurance	−0.012	−0.033	0.009	0.259
% Below poverty line	0.013	−0.005	0.032	0.153