BMC Medical Informatics and Decision Making

Table 4 Difference between practices with high (N = 4, patients scored 2,088) and low perception (N = 2, 1,293) of their risk stratification process

From: Primary care practices’ ability to predict future risk of expenditures and hospitalization using risk stratification and segmentation

	High perception			Low perception
	Practice	HCC	Δ	Practice	HCC	Δ
ED ≥ 2 (12%)
Sensitivity	0.33	0.36	− 0.03	0.26	0.25	+ 0.01
PPV	0.21	0.27	− 0.06*	0.28	0.30	− 0.02
Accuracy	0.82	0.85	− 0.03	0.72	0.70	− 0.02
Hospitalization ≥ 1 (14%)
Sensitivity	0.25	0.36	− 0.11**	0.27	0.36	− 0.09*
PPV	0.19	0.30	− 0.11**	0.32	0.41	− 0.09*
Accuracy	0.80	0.83	− 0.03	0.70	0.73	− 0.03
Expenditures ≥ 30k (9%)
Sensitivity	0.25	0.43	− 0.18**	0.28	0.37	− 0.09*
PPV	0.11	0.22	− 0.11**	0.24	0.28	− 0.04
Accuracy	0.85	0.88	− 0.03	0.71	0.74	− 0.03

ED = Emergency Department use; PPV = Positive Predictive Value; 30k = 30,000; HCC = Hierarchical Condition Category score
^*p value < .05; **p value < .01; ***p value < .001

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ISSN: 1472-6947

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