Table 3.

Health Care Utilization Outcomes: Estimated Physician-Defined Complexity vs. Outpatient Charlson Score and Estimated Physician-Defined Complexity vs. the Commercial Risk Predictor

Measure	Comparing Physician-Defined Complexity (ePDC) to Outpatient Charlson (OCS)						Comparing Physician-Defined Complexity (ePDC) to the Commercial Risk Predictor (CRP)
	Complex by						Complex by
	OCS Only n = 6,691		ePDC Only n = 10,725		ePDC & OCS n = 10,115		CRP Only n = 8,592		ePDC Only n = 9,195		CRP Only n = 8,592
	Events	Rate (ppy)	Events	Rate (ppy)	Events	Events	Events	Rate (ppy)	Events	Rate (ppy)	Events	Rate (ppy)
Primary Care Visits	73,226	2.92	153,877	3.78‡	150,137	4.26‡	100,607	3.07	116,945	3.41‡	187,069	4.50‡
Primary Care No-Shows	4070	0.16	18,308	0.45‡	14,027	0.40‡	6240	0.19	15,135	0.44‡	17,200	0.41‡
ED Visits	2869	0.11	8622	0.21‡	9283	0.26‡	4773	0.15	5778	0.17‡	12,127	0.29‡
Admissions	4004	0.16	5894	0.15‡	14,210	0.40‡	5085	0.16	4143	0.12‡	15,961	0.38‡
< 45	412	0.11	621	0.10	490	0.33‡	649	0.08	332	0.07†	779	0.28‡
45-64	751	0.10	2476	0.11‡	4234	0.33‡	997	0.12	1985	0.10‡	4725	0.30‡
65+	2841	0.21	2797	0.24‡	9486	0.46‡	3439	0.21	1826	0.19‡	10,457	0.46‡
30-Day Re-admission Ratea	3828	15.4	5612	13.0‡	13,472	18.9‡	4888	14.1	3947	12.5‡	15,137	18.3‡

*p < 0.05, †p < 0.01, ‡p < 0.001

^aRate refers to percentage of eligible hospital discharges with readmission in the subsequent 30 days

ppy = per person years

ED = Emergency Department

denom = denominator