Table 3.

Mean Costs per Patient in Postintervention Year (Year 3)

Cost Categories	Full Sample†			Low Risk of Hospitalization‡			High Risk of Hospitalization§
	Intervention (n =436)	Usual Care (n =440)	P-Value	Intervention (n =336)	Usual Care (n =344)	P-Value	Intervention (n =100)	Usual Care (n =96)	P-Value
	Mean $ ± SD			Mean $ ± SD			Mean $ ± SD
Acute care	3,201 ± 9,225	3,016 ± 9,569	.54	3,180 ± 9,775	2,589 ± 9,847	.20	3,275 ± 7,113	4,544 ± 8,376	.21
Chronic and preventive care	1,844 ± 2,210	1,716 ± 2,031	.89	1,853 ± 2,201	1,628 ± 1,697	.019	1,813 ± 2,248	2,031 ± 2,923	<.001*
Total costs	5,045 ± 9,684	4,732 ± 10,012	.97	5,032 ± 10,258	4,217 ± 10,222	.05	5,088 ± 7,481	6,575 ± 9,030	<.001*

Costs were calculated by multiplying charges by the cost-to-charge ratio for the relevant calendar year and cost center.

^*P-value remained significant (P≤.05) after multiplicity adjustment using the Bonferroni correction.

^†Seventy-five patients who died in Years 1 and 2 (38 intervention and 37 usual care) were not included in Year 3 calculations.

^‡Forty-five patients who died in Years 1 and 2 (26 intervention and 19 usual care) were not included in Year 3 calculations.

^§ Thirty patients who died in Years 1 and 2 (12 intervention and 18 usual care) were not included in Year 3 calculations.

SD =standard deviation.