Table 3.

a. HOSPITAL Score performance in potentially preventable 30-day readmissions
	Discharges (N)	30-day readmission rate	Brier score	C-statistic (95%CI)	Hosmer- Lemeshow (P-value)
All CMS diagnoses	9,181	13.6%	0.11	0.68 (0.66–0.70)	0.77
Pneumonia	3,335	11.3%	0.10	0.68 (0.65–0.71)	0.76
Heart failure	3,189	15.4%	0.12	0.68 (0.65–0.70)	0.17
Acute MI	767	12.7%	0.11	0.67 (0.61–0.72)	0.16
COPD	1,890	15.1%	0.12	0.71 (0.67–0.74)	0.81

b. HOSPITAL Score performance in potentially preventable 30-day readmissions restricted to patients age 65 years or older
	Discharges (N)	30-day readmission rate	Brier score	C-statistic (95%CI)	Hosmer- Lemeshow (P-value)
All CMS diagnoses	5,087	13.2%	0.11	0.66 (0.63–0.68)	0.27
Pneumonia	1,717	11.8%	0.10	0.64 (0.60–0.69)	0.27
Heart failure	1,918	14.1%	0.12	0.68 (0.64–0.71)	0.37
Acute MI	421	12.4%	0.12	0.68 (0.61–0.76)	0.56
COPD	1,031	14.1%	0.10	0.67 (0.62–0.72)	0.71

c. HOSPITAL score performance in all 30-day readmissions
	Discharges (N)	30-day readmission rate	Brier score	C-statistic (95%CI)	Hosmer- Lemeshow (P-value)
All CMS diagnoses	9,181	16.3%	0.13	0.68 (0.66–0.69)	0.41
Pneumonia	3,335	13.8%	0.13	0.68 (0.65–0.70)	0.49
Heart failure	3,189	18.2%	0.13	0.67 (0.65–0.70)	0.10
Acute MI	767	17.4%	0.13	0.66 (0.61–0.71)	0.49
COPD	1,890	16.6%	0.13	0.70 (0.67–0.73)	0.84