Table 8 The feature list of a hospital (PHN level referral network) for teaching hospital classification

PHN level network measures

#nodes, #edges, gini coefficient of indegree distribution, gini coefficient of outdegree distribution, alpha of indegree power law test, alpha of outdegree power law test, diameter, global clustering coefficient, local clustering coefficient, (in, in) assortativity, self degree correlation, reciprocity of # referral, reciprocity of RVUs

Difference (in - out) of edge weights on PHN traffic map

Degree, #different referred patients, #referral, geometric mean of #visit, geometric mean of RVUs, ranking index based weight

PHN position on PHN traffic map

Local clustering coefficient, PageRank, h-index

average feature of referral paths in the PHN

Length, avg-time-gap, avg-time-range, recurrent node, # nodes before recurrence, phy-entropy, PHN-entropy, HRR-entropy, common connected nodes between neighbors, bidirectional pairs

Average node position of the PHN in the national referral network

Local clustering coefficient, PageRank, h-index