Table 10.

Random Forest Analysis Results

Covariate	Number of Splits	G2	Relative Importance
Comorbidity	30,784	114.293	0.152
Hierarchical Condition Category (HCC) Cohort (e.g. Medical, Surgical, etc.)	29,459	106.811	0.142
Helpful Healthcare Contact	23,132	54.112	0.072
Promote Trust at Home	20,174	41.156	0.055
Symptom Management	21,791	38.865	0.052
Plain Language Communication at Home	19,470	38.479	0.051
Promote Trust at Hospital	17,908	36.913	0.049
Plain Language at Hospital	14,670	35.181	0.047
Integrated health system affiliation	6611	24.507	0.033
Referral to Community Services	11,620	19.863	0.026
Post Discharge Care Consultation	11,162	18.050	0.024
Patient and Family Caregiver TC Needs Assessment	10,775	17.161	0.023
Follow-up Appointment	6720	15.894	0.021
Home Visit	8808	15.822	0.021
TC Group: Patient/Family Caregiver Assessment and Information Exchange	9882	15.776	0.021
No TC Group	9707	15.496	0.021
TC Group: Hospital-based Trust, Plain Language, and Coordination	8540	15.482	0.021
TC Group: Patient Communication and Care Management	10,122	15.446	0.021
Teach Back for Information and Skills	9164	15.239	0.020
Timely Exchange of Critical Patient Information among Providers	7947	14.422	0.019
TC Group: Home-based Trust, Plain Language and Coordination	9593	14.227	0.019
Patient Goal/Preference Assessment	8617	13.815	0.018
Identify High-Risk Patients and Intervene	7320	12.338	0.016
Language Assessment	6329	11.422	0.015
Medication Reconciliation	5783	9.977	0.013
TC Group: Assessment and Teach Back	4770	8.429	0.011
Transition Team	4750	7.687	0.010
Transition Summary for Patients and Family Caregivers	3713	5.653	0.008

Notes:G² = Likelihood Ratio Test Statistic, which is twice the [natural log] entropy, or twice the change in the entropy. Entropy is Σ -log(p) for each observation, where p is the probability attributed to the response that occurred. The G² for a particular tree is the sum of the G² values for each node that splits on that predictor. For a bootstrap forest model, the G² values are added across the trees to give the G² for that variable

HCC cohorts include: Medical, Surgical, Neurology, Cardiorespiratory, Cardiovascular