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Table 3 Linear regression models 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 Independent variable R2value β Constant Significance
1 Hospitalisation cost Degree centralisation 0.012 5906.42 19545.39 0.309
2 Readmission rate Degree centralisation 0.139 −37.87 45.48 0.003
3 Hospitalisation cost Betweenness centralisation 0.107 −12384.79 27101.96 0.015
4 Readmission rate Betweenness centralisation 0.112 −25.18 18.19 0.010
5 Hospitalisation cost Density 0.118 17310.51 19635.69 0.009
6 Readmission rate Density 0.196 49.08 3.427 0.000