Table 4 Regression coefficients and 95% confidence interval: natural log of cost per inpatient bed day expressed in 2007 I $

Ln GDP per capita

1.192***

[1.111, 1.272]

Ln occupancy rate

− 0.0201**

[− 0.0340, − 0.00623]

Ln ALOS

− 0.600***

[− 0.649, − 0.550]

Ln admissions

0.0252*

[0.00471, 0.0457]

District

− 0.204***

[− 0.275, − 0.132]

Teaching

0.257***

[0.163, 0.351]

Public

− 0.144***

[− 0.182, − 0.107]

Private

0.110***

[0.0710, 0.148]

Brazil

− 1.638***

[− 1.694, − 1.583]

Constant

− 4.277***

[− 5.035, − 3.519]

Observations

3407

R ²

0.760

Adjusted R²

0.760

F_stat

1070.3

Duan’s correction factor

1.054

Variance inflation factor

1.721