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A new method to predict hospital mortality in severe community acquired pneumonia
Xin Wang1, Jianlong Jiao2, Rongwei Wei2
1Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, China; Tianjin Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China; Department of General Surgery, The Fourth Center Hospital, Tianjin, China; Center for Pulmonary Disease, Division of ICU, The Fourth Center Hospital, Tianjin, China.
Background & Aims:
The aim of this study is to develop a new method that is able to accurately predict the 28day hospital mortality in patients with severe community acquired pneumonia (SCAP) at an early stage.
Methods:
We selected 37,348 SCAP patients in ICU from 173 hospitals during 2011.1-2013.12. The predictive factors for 28day hospital mortality were evaluated retrospectively. All cases underwent intensive care, blood routine, blood biochemical tests and arterial blood gas analysis. Under the Classification and Regression Tree (CART) analysis, a new clinical scoring system was developed for early prediction in SCAP patients. The receiver-operating characteristic (ROC) curve was plotted to calculate the area under the receiver operating characteristic curve (AUC).
Results:
A novel clinical model named CLCGH scoring system, including Serum creatinine (Cr) >259.5μmol/L, leukocyte (WBC)>17.35×109/L, C-reactive protein (CRP)>189.4μg/mL, GCS≤9 and serum HCO3-≤17.65mmol/L, was carried out and each index was an independent factor for hospital mortality in SCAP. In validation cohort, the AUC of the new scoring system was 0.889 for prediction of hospital mortality, which was similar to SOFA score 0.877, APACHEII score 0.864, and was better than the PSI score 0.761 and CURB-65 score 0.767.
Conclusions:
The new scoring system CLCGH is an efficient, accurate and objective method to predicate the early hospital mortality among SCAP patients.
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