Table 2.

Bivariate analyses showing the association between care density and hospitalizations, 30-day readmissions, and Prevention Quality Indicators (PQIs) for the overall population and for patients with CHF, COPD, and DM

	All patients				CHF				COPD				DM
	Care Density Tertile				Care Density Tertile				Care Density Tertile				Care Density Tertile
	Low	Middle	High	p- value†	Low	Middle	High	p- value†	Low	Middle	High	p- value†	Low	Middle	High	p- value†
N	378,073	405,499	389,421		7,837	10,612	7,414		18,734	23,723	17,705		51,620	65,509	56,681
Mean care density (SD)	1.61 (0.59)	4.26 (0.95)	8.78 (1.40)	<.001	1.77 (0.60)	4.27 (0.94)	8.31 (1.43)	<.001	1.72 (0.59)	4.27 (0.95)	8.48 (1.43)	<.001	1.70 (0.60)	4.27 (0.94)	8.63 (1.43)	<.001
Hospitalization, %	10.9%	10.6%	8.9%	<.001	36.2%	36.8%	33.9%	<.001	24.4%	25.4%	22.0%	<.001	17.5%	17.8%	14.1%	<.001
30-day rehospitalization, %*	5.8%	5.5%	5.0%	<.001	7.0%	6.5%	6.6%	.772	6.9%	6.3%	5.9%	.177	6.2%	6.3%	5.9%	.029
PQI Composite, %^	1.2%	1.3%	1.0%	<.001	6.1%	6.1%	5.6%	.295	3.6%	3.7%	3.0%	<.001	2.3%	2.2%	1.6%	<.001
PQI Disease-Composite, %	n/a	n/a	n/a		3.9%	3.8%	3.7%	.860	0.5%	0.3%	0.3%	.004	1.6%	1.5%	1.1%	<.001

^*Among patients who had at least 1 hospital admission

^{^}See Appendix Table 1 for listing of PQIs. Note that lower scores are better.