• Byeong-Ho Jeong, Eun Ju Jeon, Hongseok Yoo, Won-Jung Koh, Gee Young Suh, Man Pyo Chung, Kwon O Jung OJ, and Kyeongman Jeon.
• Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, Korea.
• Lung. 2014 Apr 1; 192 (2): 313-20.

BackgroundWe compared the demographic characteristics and outcomes of patients with severe healthcare-associated pneumonia (HCAP) to those with severe community-acquired pneumonia (CAP).MethodsThis was a retrospective study of prospectively collected data from all consecutive patients with severe pneumonia who were admitted to the hospital through the emergency department between January 2008 and December 2010.ResultsDuring the study period, 247 patients had severe pneumonia; of these, 107 had severe CAP and 140 had severe HCAP. There was no significant difference in demographic characteristics between the two groups, except for comorbidities. Although the incidence of potentially drug-resistant pathogens was higher in patients with severe HCAP than in those with severe CAP (34 vs. 6 %, P = 0.004), there was no statistically significant difference in the rate of inappropriate antibiotic treatment (16 vs. 3 %, P = 0.143). Finally, clinical outcomes, such as intensive care unit admission, length of hospital stay, and in-hospital mortality, were not different between the two groups. In a multiple logistic regression analysis, a higher PSI score (adjusted OR 1.01; 95 % CI 1.00-1.02; P = 0.024) and the need for mechanical ventilation (adjusted OR 2.62; 95 % CI 1.37-5.00; P = 0.004) were independently associated with in-hospital mortality. However, the type of pneumonia was not associated with in-hospital mortality after adjusting for potential confounding factors.ConclusionsThe severity of illness rather than the type of pneumonia might be associated with in-hospital mortality in patients with severe pneumonia.

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