Table 4.

Percent Change in Treatment Group Hospital Admission Rates by Total Number of Calls

	Diabetes		Heart Disease		Total Population
	% Change		% Change		% Change
Total Calls During Treatment Period	12 months*	18 months**	12 months**	18 months**	12 months**	18 months**
1	11.0%	19.5%	−10.5%	3.8%	−3.2%	9.5%
2 – 3	2.4%	4.4%	−21.4%	−25.8%	−14.4%	−17.5%
4 – 5	−6.4%	−25.2%	−26.6%	−35.2%	−19.0%	−30.5%
6 – 7	−17.9%	−6.5%	−28.6%	−24.9%	−20.4%	−22.9%
8 – 10	−21.5%	−4.8%	−43.0%	−24.8%	−39.0%	−12.3%
11+	−24.2%	−6.7%	−8.7%	−23.4%	−15.2%	−19.4%

Statistical significance of the effect of number of calls was tested using multivariate logistic regression for the difference-in-difference change (increase or no change versus decrease from baseline to 12- or 18-month program period) in hospital admissions controlling for age, sex, number of core diseases, and hospitalizations in prior 24 months (y/n).

^*P<0.001, ^** P<0.0001.