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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