A simple scoring system based on neutrophil count in sepsis patients

Area of Science:

• Critical Care Medicine
• Hematology
• Biomarkers

Background:

• Assessing critically ill patients is challenging, with existing scoring systems like APACHE II and SOFA correlating with outcomes.
• Neutrophil counts are recognized as potential sepsis markers, but their dual nature (high/low counts indicating severity) complicates direct outcome prediction.
• Repeated measures of established scores can assess organ dysfunction but may not always be practical or readily available.

Purpose of the Study:

• To develop and evaluate a novel, simple scoring system (n-score) using neutrophil counts and patient demographics to predict mortality in Intensive Care Unit (ICU) patients.
• To determine if the n-score is as reliable as established scores like APACHE II and SOFA in estimating mortality risk.
• To establish a readily accessible tool for clinicians to assess sepsis severity and patient prognosis.

Main Methods:

• A retrospective evaluation of 77 patients diagnosed with sepsis, severe sepsis, or septic shock was conducted.
• A novel scoring system (n-score) was calculated based on neutrophil count ranges, with adjustments for patient sex.
• The n-score was compared to survival outcomes and correlated with established scoring systems (APACHE II, SOFA).

Main Results:

• The n-score was significantly higher in non-survivors compared to survivors of sepsis and severe sepsis/septic shock (p<0.01).
• Receiver Operating Characteristic (ROC) curve analysis indicated an area under the curve of 0.736, with a sensitivity of 61.5% and specificity of 80.4% at an n-score of 3.8.
• The n-score demonstrated significant correlations with both APACHE II (p<0.01) and SOFA (p<0.05) scores on admission.

Conclusions:

• The n-score shows potential as a useful and simple scoring system for identifying the risk of death in patients with sepsis and severe sepsis/septic shock.
• Preliminary evaluations suggest the n-score may be a reliable indicator of mortality, comparable to existing complex scoring systems.
• Further validation of the n-score is warranted to confirm its utility in clinical practice for sepsis management.