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Figure 2 | BMC Medical Informatics and Decision Making

Figure 2

From: Diagnosis-specific readmission risk prediction using electronic health data: a retrospective cohort study

Figure 2

Variables included in final regression models for each comorbid condition. *Based on the enhanced ICD-9 coding of the Elixhauser comorbidity classification [29]. Hypertension combines hypertension, uncomplicated with complicated. Only used data from index encounter. Versus not black. At least once during the index hospitalization. §Excluding topical steroids. || Documented in the social history. **Single includes single, widowed, divorced and separated. ††Using ICD-9 procedure codes during index hospitalization.

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