The number of discharge medications predicts thirty-day hospital readmission: a cohort study

Table 2 Variables Independently Associated with Thirty-Day Readmission

Variables	OR	95 % CI	P value	Risk Score
Number of Discharge Medications >6	1.26	1.17–1.36	0.003	1.0
Number of ED visits > 1^ab	2.37	2.19–2.57	<0.001	2.0
Minimum Hb value ≤ 9 gm/dl	1.67	1.54–1.81	<0.001	1.5
Congestive Heart Failure	1.52	1.40–1.67	<0.001	1.5
Peripheral Vascular Disease	1.42	1.28–1.59	0.001	1.5
Cirrhosis	1.26	1.21–1.32	<0.001	1.0
Metastatic Cancer	1.08	1.06–1.11	0.002	1.0

^aWithin 6 months of the index hospitalization
^bCut-points for number of discharge medications, emergency department visits, and minimum Hg value were assessed by receiver-operating characteristic curves as described in the Methods section
Abbrevations: OR odds ratio, CI confidence interval, ED emergency department, Hb hemoglobin

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