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. 2014 Mar 4;15(1):27. doi: 10.1186/1465-9921-15-27

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Copyright © 2014 Aliberti et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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The cumulative probability of survival in the three study groups. Group A: community-acquired pneumonia (CAP) patients with neither acute respiratory failure (ARF) nor severe sepsis (SS) on admission. Group B: CAP patients with only ARF on admission. Group C: CAP patients with both ARF and SS on admission. Adjusted for centers, sex, age, comorbidities (including congestive heart failure, cerebrovascular accident, diabetes, chronic obstructive pulmonary disease, liver and renal diseases), residence in nursing home, multilobar infiltrate, pleural effusion, empiric antibiotic therapy concordant with European respiratory Society guidelines.