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Reliability and accuracy of Sequential Organ Failure Assessment (SOFA) scoring
D G T Arts1, N F de Keizer, M B Vroom
1Department of Medical Informatics, Academic Medical Center-Universiteit van Amsterdam, Amsterdam, Netherlands.
Critical Care Medicine
|September 9, 2005
Summary
The Sequential Organ Failure Assessment (SOFA) score demonstrates good reliability and accuracy among physicians in quantifying patient illness severity. Further measures can enhance SOFA scoring precision in clinical practice.
Area of Science:
- Critical Care Medicine
- Clinical Epidemiology
- Health Outcomes Research
Background:
- The Sequential Organ Failure Assessment (SOFA) score is a key tool for assessing organ dysfunction severity in critically ill patients.
- Evaluating the accuracy and reliability of SOFA scoring is crucial for its effective clinical application.
Purpose of the Study:
- To assess the accuracy and inter-rater reliability of the SOFA score.
- To identify factors influencing SOFA scoring accuracy.
Main Methods:
- A prospective study was conducted in an adult intensive care unit.
- Twenty ICU physicians independently scored 15 randomly selected patient cases each.
- Physician scores were compared against a gold standard established by expert consensus.
Main Results:
- High reliability was observed for the total SOFA score (intraclass correlation coefficient = .889).
- Weighted kappa values indicated moderate to almost perfect agreement across different organ systems.
- Overall accuracy for the total SOFA score was 53%, with a mean deviation of 0.82 from the gold standard.
Conclusions:
- SOFA scoring exhibits good reliability and accuracy among ICU physicians.
- Common errors included inattention, calculation mistakes, and misinterpretation of scoring rules.
- Implementing additional measures is recommended to further improve SOFA scoring precision.