• Joong Eui Rhee, Adam J Singer, Sion Jo, and In Soo Cho.
• Department of Emergency Medicine, Seoul National University Bundang Hospital, Seoul, Korea.
• J Emerg Med. 2012 Feb 1;42(2):133-8.

BackgroundCommunity-acquired pneumonia (CAP) is a common reason for admissions in the emergency department (ED). However, patient disposition is not always standardized.ObjectiveTo evaluate the effect of incorporating a pneumonia severity index (PSI) on admission rates and medical costs in CAP patients presenting to the ED.MethodsFrom April 2008 to March 2009, CAP patients presenting to the ED were prospectively screened and low-risk CAP patients (PSI I, II, or III) were enrolled (after group). Discharge and outpatient care were recommended for this group in the absence of other medical conditions requiring hospitalization. Data from low-risk CAP patients from May 2003 to October 2006 were also collected for comparative analysis (before group).ResultsThere were 365 and 174 patients in the before and after groups, respectively. The admission rate of the after group was significantly lower than that of the before group (30.4% vs. 68.2%, p < 0.01). The subsequent admission rates after ED discharge due to CAP were similar (3.2% vs. 7.7%, p = 0.10). The ultimate admission rate in the after group was significantly lower than that in the before group (32.5% vs. 70.7%, p < 0.01). Direct medical costs per patient for the before and after groups were $US 1532 and $US 1186, respectively (p = 0.03).ConclusionsIncorporation of the PSI into the admission protocol for ED patients with CAP significantly reduced the admission rates and medical costs.Copyright © 2012 Elsevier Inc. All rights reserved.

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