• Lauge Sokol-Hessner, Andrew A White, Katherine F Davis, Shoshana J Herzig, and Samuel F Hohmann.
• Hospital Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
• J Hosp Med. 2016 Apr 1; 11 (4): 245250245-50.

BackgroundPrior work suggests interhospital transfer (IHT) may be a risky event. Outcomes for patients transferred from another acute care institution and discharged by hospitalists and general internists at academic health systems are not well described.ObjectiveInvestigate the characteristics and outcomes of IHT patients compared with patients admitted from the emergency department (ED) to academic health systems.DesignRetrospective cohort study.Setting/PatientsA total of 885,392 adult inpatients discharged by hospitalists or general internal medicine physicians from 158 academic medical centers and affiliated hospitals participating in the University HealthSystem Consortium Clinical Database and Resource Manager from April 1, 2011 to March 31, 2012.MethodsPatient cohorts were defined by admission source: those from another acute care institution were IHTs, and those coming through the ED whose source of origination was not another hospital or ambulatory surgery site were ED admissions. In-hospital mortality was our primary outcome. We analyzed our data using descriptive statistics, t tests, χ(2) tests, and logistic regression.ResultsCompared with ED admissions, IHT patients had a longer average length of stay, higher proportion of time spent in the intensive care unit, higher costs per hospital day, lower frequency of discharges home, and higher inpatient mortality (4.1% vs 1.8%, P < 0.01). After adjusting for patient characteristics and risk of mortality measures, IHT patients had a higher risk of in-hospital death (odds ratio: 1.36, 95% confidence interval: 1.29-1.43).ConclusionsIn this large national sample, IHT status is independently associated with inpatient mortality.© 2015 Society of Hospital Medicine.

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