Table 1 Descriptive statistics for episode-based and patient-based networks from 2005 to 2010 constructed from 1-year windows. All statistics are averages over all HRRs. We report the average number of ties (Ties), average number of nodes (Nodes), average degree (Degree), average clustering (Clustering) and average proportion of tie types based on specialty (last six columns: PP, MM, SS, PM, PS, MS), where the specialties are primary care (P), medical specialist (M), and surgical specialist (S)

From: Comparison of physician networks constructed from thresholded ties versus shared clinical episodes