BMC Health Services Research

Table 1 Regression Estimates and Scoring of Predictive Risk Factors: Original Model and Bootstrapping Validation Model

From: Use of an electronic administrative database to identify older community dwelling adults at high-risk for hospitalization or emergency department visits: The elders risk assessment index

	Original Model				Validation Model¹
	Regression Estimate	Standard Error	P-value	Score	Regression Estimate	Standard Error	Score
Married	-0.12	0.03	<. 01	-1	-0.12	0.04	-1
Age 70-79	0.11	0.04	<. 01	1	0.11	0.03	1
Age 80-89	0.31	0.04	<. 01	3	0.31	0.05	3
Age 90 or more	0.67	0.08	<. 01	7	0.67	0.10	7
1-5 hosp days in 2003 or 2004	0.55	0.04	<. 01	5	0.54	0.05	5
6 or more hosp days in 2003 or 2004	1.10	0.05	<. 01	11	1.10	0.07	11
History of Diabetes	0.17	0.04	<. 01	2	0.17	0.04	2
History of CAD/MI/CHF	0.31	0.04	<. 01	3	0.31	0.04	3
History of Stroke	0.23	0.05	<. 01	2	0.23	0.06	2
History of COPD	0.47	0.05	<. 01	5	0.48	0.07	5
History of Cancer	0.10	0.04	<. 01	1	0.10	0.04	1
History of Dementia	0.31	0.05	<. 01	3	0.31	0.06	3

¹Estimate of each predictor is the mean of the regression coefficients of each predictor from 450 samples. Reported standard error is the standard error of the mean estimates.

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