Abstract:
Objective To explore the predictive value of the serum biomarkers on acute respiratory distress syndrome (ARDS) in patients with severe community-acquired pneumonia (SCAP).
Methods A total of 53 SCAP patients admitted to the respiratory intensive care unit (RICU) of Zhongshan Hospital, Fudan University from January 2019 to March 2021 were selected, and were divided into ARDS group (n=24) and non-ARDS group (n=29) according to the occurrence of ARDS within 7 days after admission. Demographic information, acute physiology and chronic health evaluationⅡ(APACHEⅡ) score, pneumonia severity index (PSI), sequential organ failure assessment (SOFA) score, oxygenation index, laboratory data levels and 28-day mortality were compared between the two groups. Serum interleukin (IL) -6, IL-1β, tumor necrosis factor-α (TNF-α), IL-10, sphingosine-1-phosphate (S1P), angiopoietin-2 (Ang-2) and von Willebrand factor (vWF) were detected by ELISA. The logistic regression was used to analyzed independent risk factors of ARDS, and ROC curve was used to estimate the predictive value of each factor.
Results There was no significant difference in APACHEⅡscore, SOFA score, C-reactive protein (CRP), procalcitonin (PCT), rate of mechanical ventilation and 28-day mortality between the two groups. Compared with non-ARDS group, the serum levels of IL-6 and vWF were significantly increased, while S1P was significantly decreased in ARDS group (P < 0.05). The logistic regression analysis showed that vWF (OR=1.017, P=0.010), IL-6 (OR=1.087, P=0.020) and oxygenation index (OR=0.983, P=0.039) were independent risk factors for ARDS. The area under the curve (AUC) of vWF and IL-6 predicting ARDS was 0.881 and 0.749, and the cut-off values were 296.1% and 32.35 μg/L, respectively.
Conclusions IL-6 and vWF can predict the occurrence of ARDS in patients with SCAP.