Table 3.

Predictors of All-Cause 30-Day Re-admission According to DERRI™ Plus Hemoglobin A1c and Cholesterol in External Validation Sample

Predictor	Odds ratio (95% CI)	P value
Home zip code <5 miles from hospital	1.06 (1.02–1.11)	.0085
Employment status (vs. employed)
Disabled	1.36 (1.26–1.46)	<.0001
Retired	1.05 (0.99–1.12)	.093
Unemployed	1.35 (1.23–1.49)	<.0001
Other or not recorded	1.03 (0.96–1.10)	.39
Pre-admission insulin use	1.04 (1.00–1.09)	.041
Macrovascular complicationsa, n (vs. 0)
1	0.91 (0.86–0.96)	.0002
2	0.99 (0.94–1.04)	.67
3	1.09 (1.02–1.17)	.016
4	1.14 (0.99–1.30)	.067
Admission hematocrit, per 5%	0.91 (0.89–0.93)	<.0001
Log (admission serum creatinine)	1.19 (1.15–1.23)	<.0001
Admission serum sodium (vs. normal)
Low, <135 mmol/L	1.11 (1.06–1.15)	<.0001
High, >145 mmol/L	1.25 (1.08–1.45)	.0028
Discharged within 90 days before admission	1.89 (1.80–1.98)	<.0001
Most recent discharge status up to 1 year before admission (vs. home)
Against medical advice	1.23 (0.97–1.56)	.089
Home with nursing care	1.06 (1.00–1.14)	.068
No discharge recorded	0.87 (0.81–0.92)	<.0001
Subacute facility	0.96 (0.89–1.04)	.37
Anemia, current or prior diagnosis	1.12 (1.08–1.17)	<.0001
Hemoglobin A1c (vs. 6.5–8.0%)
<6.5%	1.06 (1.00–1.11)	.04
>8.0%	0.99 (0.94–1.05)	.84
Unknown	1.04 (0.99–1.10)	.14
Total cholesterol (vs. 150–200 mg/dL)
<150 mg/dL	1.07 (1.01–1.12)	.012
>200 mg/dL	1.04 (0.96–1.12)	.35
Unknown	1.00 (0.95–1.05)	.95

Abbreviation: DERRI™ = Diabetes Early Re-admission Risk Indicator.

^aCoronary artery disease, heart failure, stroke, peripheral vascular disease.