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Availability of suPAR in emergency departments may improve risk stratification: a secondary analysis of the TRIAGE III trial

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Introduction: Soluble urokinase plasminogen activator receptor (suPAR) is a prognostic and nonspecific biomarker associated with short-term mortality in emergency department (ED) patients. Therefore, the blood level of suPAR might be usable for identification of patients at high- and low risk, shortly after arrival at the ED. Here, we investigate the value of adding suPAR to triage and how this may impact on risk stratification regarding mortality. Methods: The analyses were performed on the TRIAGE III cohort. Patients were triaged in four groups: Red, Orange, Yellow, and Green. Outcome was all-cause mortality within seven days. Discriminative abilities of triage and suPAR on mortality were assessed using the area under the curve (AUC) for receiver operating characteristics (ROC) curves. A suPAR cut-off value was generated using the Youden's index. Patients were subsequently reclassified one triage level up if the suPAR level was above this cut-off and one level down if the suPAR level was below that value. Results: The study included 4420 patients with an available triage category and suPAR measurement. suPAR was significantly better in predicting mortality than triage; AUC (95% confidence interval): 0.85 (0.80-0.89) vs. 0.71 (0.64-0.78), P < 0.001. Combining suPAR and triage yielded an AUC of 0.87 (0.82-0-93). The Youden's cut-off of suPAR was 5.9 ng/mL and reclassified triage using this value resulted in a more accurate risk stratification regarding hospital admission and mortality. Conclusion: Addition of suPAR to triage potentially improves prediction of short-term mortality. Measurement of suPAR in relation to the triage process may allow a more accurate identification of ED patients at risk. Trial registration: Clinicaltrials.gov, NCT02643459. Registered 31 December 2015. https://clinicaltrials.gov/ct2/show/NCT02643459?cond=NCT02643459&rank=1.

Original languageEnglish
Article number43
JournalScandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Volume27
Issue number1
Pages (from-to)43
ISSN1757-7241
DOIs
Publication statusPublished - 11 Apr 2019

    Research areas

  • Emergency department, Prognostic biomarkers, Risk stratification, suPAR, Triage

ID: 56977345