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Table 15 Significant predictors for LR on two binary treatment variables with estimated coefficients in 95% confidence interval (CI)

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

(a) death1yr
Feature Estimate 95% CI p-value
#nodes in domain HRR −0.243 (−0.389−0.098) 1.03E−03
Physician distribution entropy −0.313 (−0.625−0.0013) 0.049
PHN distribution entropy −0.528 (−0.692−0.365) 2.34E−10
#pairs of nodes with reciprocal referrals −2.496 (−3.666−1.325) 2.93E−05
Avg. PageRank values on a referral path −2.290 (−2.803−1.778) <2E−16
Avg. index of first occurrence −0.569 (−0.974−0.164) 0.0059
Avg. proposed #cross-PHN referrals 1.628 (0.961 2.295) 1.73E−06
Avg. #referrals on the corresponding edges 8.696 (4.771 12.620) 1.41E−05
Avg. ranking-based weight on the corresponding edges −3.973 (−6.426−1.519) 0.0015
#previous paths 2.204 (1.908 2.500) <2E−16
Total RVU 11.414 (10.461 12.367) <2E−16
Times of being the end node of the last physician −2.985 (−4.075−1.896) 7.89E−08
Avg. first occurrence index of the last physician 4.869 (4.176 5.562) <2E−16
Times of occurring multiple times of the last physician 1.778 (1.041 2.514) 2.23E−06
(b) PCI
Feature Estimate 95% CI p-value
Physician distribution entropy −0.368 (−0.678−0.058) 0.019
PHN distribution entropy 0.547 (0.359 0.734) 1.08E−08
Avg. #common connected nodes between neighbors 0.487 (0.097 0.877) 0.014
Avg. PageRank values on a referral path 3.874 (3.337 4.411) <2E−16
Avg. proposed #cross-PHN referrals −1.738 (−2.278−1.197) 2.89E−10
Avg. #referrals on the corresponding edges −2.222 (−3.822−0.622) 0.0065
#previous paths −1.845 (−2.155−1.533) <2E−16
Total RVU −2.113 (−2.909−1.315) 2.02E−07
Local clustering coefficient of the last physician −1.352 (−1.969−0.735) 1.76E−05
Avg. first occurrence index of the last physician −3.024 (−4.034−2.013) 4.48E−09