Table 4.

Hospitalizations and Outpatient Emergency Department Visits for High‐Risk Beneficiaries in Phases I and II, by Treatment Status, Controlling for Changes in Patient Population

	Phase I	Phase II	Adjusted Difference (p‐value)
Annualized hospitalizations, number per person per year
Treatment	0.632	0.614	−0.018 (.86)
Control	0.825	0.544	−0.281 (.009***)
Adjusted difference (p‐value)	−0.193 (0.06*)	0.069 (0.44)	0.262 (.05*)
Annualized outpatient emergency department visits, per person per year
Treatment	0.415	0.766	0.351 (<.001***)
Control	0.663	0.739	0.075 (.45)
Adjusted difference (p‐value)	−0.248 (0.009***)	0.027 (0.74)	0.276 (.03**)
Sample sizes
Treatment	188	241
Control	178	242
Combined	366	483

The control group means in Phase I of the demonstration are weighted but not regression‐adjusted. The means for the treatment group in Phase I and the means for both the treatment and control groups in Phase II are calculated by adding appropriate coefficient(s) from the regression model (described in text) to the Phase I control group mean.

*p < .10, **p < .05, ***p < .01.