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Table 4 Linear regression models for checking controlling effect of patient age on the relation between each of network attributes (i.e. degree centralisation , betweenness centralisation and density ) of PCN and hospital performance measures (i.e. hospitalisation cost and readmission rate )

From: A study of physician collaborations through social network and exponential random graph

Model

Dependent variable

R2value

Constant

Independent variable

β

Significance

1

Hospitalisation cost

0.102

20016.04

Degree centralisation

-26621.75

0.084

Degree centralisation * Age

463.16

0.102

2

Hospitalisation cost

0.227

27106.44

Betweenness centralisation

-102698.68

0.000

Betweenness centralisation * Age

1318.36

0.000

3

Hospitalisation cost

0.188

19216.11

Density

-60258.64

0.016

Density * Age

1155.44

0.001

4

Readmission rate

0.113

45.82

Degree centralisation

-50.37

0.078

Degree centralisation * Age

0.18

0.622

5

Readmission rate

0.094

18.17

Betweenness centralisation

-75.92

0.110

Betweenness centralisation * Age

0.745

0.273

6

Readmission rate

0.081

1.318

Density

20.08

0.677

    

Density * Age

0.314

0.651