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Modified Sequential Organ Failure Assessment sepsis score in an emergency department setting: Retrospective
Nigel J Raymond1, Mai Nguyen2, Sandra Allmark3
1Infection Service, Capital and Coast District Health Board, Wellington Hospital, Wellington, New Zealand.
Objective:
Use of the Sequential Organ Failure Assessment (SOFA) score has been proposed by the Third International Consensus Definitions for Sepsis and Septic Shock. The utility in the ED is not yet well established. We retrospectively studied the application of a modified SOFA (mSOFA) score, to assess its ability to predict mortality.
Methods:
At our urban tertiary teaching hospital staff recorded patients with probable sepsis in the ED Information System (EDIS). Data was analysed for the year of July 2015 to June 2016. For a sample of the suspected sepsis patients, ED and inpatient clinical records were manually reviewed to ascribe an mSOFA score and assess its performance in predicting mortality, with a primary outcome of death by 30 days.
Results:
There were 474 patients recorded over the 1 year with probable sepsis, of whom 228 were manually reviewed. The mSOFA was a significant predictor of mortality at all the time points tested. The 30 day mortality was 22/88 (25%) for those with a positive mSOFA score and 3 out of 140 (2.1%) of those with a negative mSOFA score (OR 15.2, 95% CI [4.4, 52.7]; P < 0.001). This equated to a negative predictive value of 97.9% (95% exact CI 93.9-99.6%).
Conclusion:
For ED patients thought likely to have sepsis, the mSOFA score distinguished those with a high or low mortality risk. The high negative predictive value could be practically useful. Prospective study of the mSOFA score used in ED will be needed to validate these observations.
Insights
The modified Sequential Organ Failure Assessment (mSOFA) score effectively predicts mortality in emergency department (ED) sepsis patients. A negative mSOFA score demonstrated a high negative predictive value, indicating low 30-day mortality risk.
Area of Science:
- Emergency Medicine
- Critical Care Medicine
- Clinical Scoring Systems
Background:
- The Third International Consensus Definitions for Sepsis and Septic Shock proposed the Sequential Organ Failure Assessment (SOFA) score.
- The utility of the SOFA score in the emergency department (ED) for sepsis management is not well-established.
- Assessing novel scoring systems for sepsis prediction in the ED is crucial for timely intervention.
Purpose of the Study:
- To evaluate the predictive ability of a modified SOFA (mSOFA) score for mortality in patients with probable sepsis in the ED.
- To determine the negative predictive value of the mSOFA score in identifying low-risk sepsis patients.
Main Methods:
- A retrospective study was conducted at an urban tertiary teaching hospital.
- Data from July 2015 to June 2016 included patients with probable sepsis recorded in the ED Information System (EDIS).
- A sample of patients had their clinical records manually reviewed to assign an mSOFA score and assess 30-day mortality.
Main Results:
- Out of 474 probable sepsis patients, 228 were manually reviewed.
- The mSOFA score was a significant predictor of mortality.
- 30-day mortality was 25% for positive mSOFA scores versus 2.1% for negative scores (OR 15.2, P < 0.001), yielding a negative predictive value of 97.9%.
Conclusions:
- The mSOFA score effectively differentiates sepsis patients into high and low mortality risk groups in the ED setting.
- The high negative predictive value of the mSOFA score suggests practical utility for risk stratification.
- Further prospective studies are required to validate these findings for routine ED use.
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