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Study finds extensive patient sharing among hospitals; could impact spread of infectious diseases
Date:3/18/2009

San Diego, CA (March 19, 2009) - Findings from the first in-depth study of patient sharing show that hospitals share large numbers of patients with other acute care facilities without knowing it. In the new study released today at the annual meeting of the Society for Healthcare Epidemiology of America (SHEA), researchers found that only one in nine shared patients is directly transferred from one hospital to another, whereas most patients were discharged before being readmitted to another hospital. This high underestimation of patient sharing has important implications for handling the potential spread of infectious disease among acute care facilities, since patient sharing could be an avenue of transmission if a major disease outbreak were to occur.

"We were surprised to find extensive interlinking of all the hospitals included in the study," said Susan S. Huang, MD, MPH, assistant professor and hospital epidemiologist, University of California Irvine School of Medicine and SHEA member. "The level of patient sharing among hospitals is grossly underestimated because patients often don't transfer directly between hospitals."

The study included nearly 240,000 patient admissions. Researchers assessed direct and indirect transfers among all 31 acute care hospitals in Orange County, CA, a large metropolitan county of three million people, using a retrospective evaluation of 2005 California Hospital Discharge Data. Huang and colleagues examined the likelihood that adult patients admitted to each hospital in 2005 would subsequently be transferred or admitted to another hospital in the county in the 365 days following their discharge. This research did not include skilled nursing homes, psychiatric hospitals or rehabilitation facilities, which according to Huang could mean that the amount of patient sharing among all healthcare facilities is even higher than their study found.

A large number of people (22 percent) who are discharged f
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Contact: Jen Deets
jdeets@gymr.com
202-745-5110
Society for Healthcare Epidemiology of America
Source:Eurekalert

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