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Table 16 Significant predictors in multiple linear regression models for log(Total 1yr payments) with estimated coefficients in %95 confidence interval (CI)

From: Referral paths in the U.S. physician network

Feature Estimate CI p-value
#nodes in domain HRR 0.121 (0.099 0.142) < 2E−16
referral reciprocity in domain HRR 0.209 (0.167 0.251) < 2E−16
#nodes - 2.588 (−2.992−2.183) < 2E−16
Physician distribution entropy 1.365 (1.321 1.410) < 2E−16
PHN distribution entropy 0.413 (0.347 0.480) < 2E−16
Avg. #common connected nodes between neighbors − 0.357 (−0.432−0.282) < 2E−16
#pairs of nodes with reciprocal referrals 2.618 (2.374 2.863) < 2E−16
Avg. local clustering coefficient on the referral path − 1.222 (−1.326−1.117) < 2E−16
Avg. PageRank values on the referral path 0.983 (0.888 1.077) < 2E−16
Avg. index of first occurrence on the referral path 0.341 (0.235 0.447) 3.05E−10
Avg. proposed #cross-PHN referrals − 0.592 (−0.685−0.498) < 2E−16
Avg. #referrals on the corresponding edges −0.567 (−0.902−0.232) 9.25E−04
Avg. ranking-based weight on the corresponding edges 0.775 (0.485 1.064) 1.59E−07
#previous paths 0.304 (0.212 0.396) 9.28E−11
Total RVU 5.028 (4.604 5.451) < 2E−16
Month of the first visit categorical vary for groups < 2E−16
Specialty of the key physician categorical vary for groups < 2E−16
Month of the last visit categorical vary for groups < 2E−16
Avg. first occurrence index of the last physician − 0.433 (−0.686−0.179) 7.99E−04
  1. Asterisk means the predictor has significant interactions with time