Table 3.

Variables in the final logistic regression model for prediction of 30-day readmissions.

Variable	Beta coefficient	Adjusted odds ratio (95% CI)	P value
Age	0.018	1.019 (1.013–1.024)	<0.001
Charlson comorbidity index	0.213	1.238 (1.097–1.396)	0.001
White cell count	0.038	1.039 (1.003–1.077)	0.035
Serum albumin	−0.057	0.944 (0.927–0.962)	<0.001
ED visits in previous 6 months	0.239	1.270 (1.062–1.519)	0.009

CI: confidence interval; ED: emergency department.