• Clin Lab · May 2020

    Serum Prealbumin Improves the Sensitivity of Pneumonia Severity Index in Predicting 30-day Mortality of CAP Patients.

    • Hai F Zhang, Li Q Li, Yan L Ge, Jia B Zhang, Ai S Fu, Cong H Liu, Dong F Shao, Jing Bai, and Xiao Y Zhu.
    • Clin Lab. 2020 May 1; 66 (5).

    BackgroundSerum prealbumin (PAB) is an effective tool to evaluate patients with malnutrition. In recent years, studies have shown that PAB is statistically reduced during the course of disease infection. The pneumonia severity index (PSI) scoring system is one of the most widely used scoring tools to evaluate the condition and prognosis of community acquired pneumonia (CAP) patients. However, few studies have reported on PSI combined with blood indicators to predict the prognosis of pneumonia. The aim of this study was to investigate the prognostic value of PAB combined with PSI in patients with CAP.MethodsWe retrospectively analyzed the data of 400 patients who met the inclusion criteria. Death and survival were selected as prognostic indicators of pneumonia. On the first day after admission, venous blood samples were taken to test PAB and PSI scores. Subject operating characteristic curve (ROC) was used to evaluate PSI, PAB, and PSI combined with PAB to predict 30-day mortality of CAP patients.ResultsThe 30-day mortality rate of CAP patients was 10.5% (42/400). PAB and PSI score were independent risk factors for 30-day mortality in CAP patients. The sensitivity, specificity, positive predictive value, and negative predictive value of PAB predicting the death of CAP patients were 86.3%, 79%, 50.74%, and 95.83%, respectively. The sensitivity, specificity, positive predictive value, and negative predictive value of PSI predicting the death of CAP patients were 74.80%, 63%, 33.71%, and 90.99%, respectively. The sensitivity, specificity, positive predictive value, and negative predictive value of the combined index predicting the death of CAP patients were 95.20%, 77.80%, 51.70% and 98.41%, respectively.ConclusionsSerum prealbumin is a relatively simple acquired index and an independent risk factor for death in CAP patients. Serum prealbumin improves the sensitivity of pneumonia severity index in predicting 30-day mortality of CAP patients.

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