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Updated: Jun 11, 2025

A Data-Driven Approach to Quantifying Immune States in Sepsis
Published on: February 7, 2025
Immune cell composition and its impact on prognosis in children with sepsis
Huabin Wang1,2,3,4, Cheng Guo1,3,4, Yayan Wang1,3,4
1Department of Pediatrics, Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, China.
Insights
Elevated neutrophil to lymphocyte and platelet ratios (NLPR) in septic children indicate a higher risk of mortality. This simple blood test shows prognostic potential comparable to established scores for predicting outcomes in pediatric sepsis.
Area of Science:
- Pediatric critical care medicine
- Immunology
- Hematology
Background:
- Sepsis pathogenesis involves critical immune cell responses.
- Evaluating immune cell ratios offers prognostic insights in pediatric sepsis.
Purpose of the Study:
- To assess the prognostic significance of various peripheral blood immune cell ratios in children with sepsis.
- To determine the predictive value of these ratios for mortality in pediatric sepsis patients.
Main Methods:
- Retrospective analysis of clinical data from 230 septic children.
- Calculation of neutrophil to lymphocyte ratio (NLR), derived NLR (dNLR), neutrophil to lymphocyte and platelet ratio (NLPR), monocyte to lymphocyte ratio (MLR), and platelet to lymphocyte ratio (PLR).
- Statistical analysis using LOWESS, ROC analysis, and K-M analysis to correlate ratios with mortality.
Main Results:
- All tested immune cell ratios, except PLR, were higher in non-survivors.
- NLPR, NLR, MLR, and dNLR showed a linear association with in-hospital mortality.
- NLPR demonstrated the highest AUC (0.748), comparable to the Pediatric Critical Illness Score (PCIS).
- Elevated MLR, NLR, dNLR, and NLPR were linked to increased 30-day mortality.
Conclusions:
- The NLPR is a potential prognostic indicator in pediatric sepsis.
- NLPR's predictive capacity is comparable to the established PCIS.
- Immune cell ratios offer valuable prognostic information for septic children.
Background:
Given the critical role of immune cells and their responses in sepsis pathogenesis, this study aimed to evaluate the prognostic significance of various immune cell ratios in septic children through the collection and analysis of clinical data.
Methods:
Clinical data were collected from septic children admitted to the pediatric intensive care unit (PICU) of Shenzhen Children's Hospital between January 2019 and September 2021. The peripheral blood immune cell ratios included the neutrophil to lymphocyte ratio (NLR), the derived neutrophil to lymphocyte ratio (dNLR), the neutrophil to lymphocyte and platelet ratio (NLPR), the monocyte to lymphocyte ratio (MLR), and the platelet to lymphocyte ratio (PLR). To investigate the associations between these immune cell ratios and mortality, we utilized the locally weighted scatterplot smoothing (LOWESS) method, receiver operating characteristic (ROC) analysis, and Kaplan‒Meier (K‒M) analysis.
Results:
A total of 230 septic children were enrolled in the study. When comparing the immune cell ratios between the deceased and surviving groups, all ratios except for the PLR were elevated in the deceased group. Using the LOWESS method, we observed that the MLR, NLR, dNLR, and NLPR exhibited an approximately linear association with in-hospital mortality. Among the various immune cell ratios, the NLPR exhibited the highest AUC of 0.748, which was statistically comparable to that of the Pediatric Critical Illness Score (PCIS) (0.748 vs. 0.738, P = 0.852). The NLR (0.652), MLR (0.638), and dNLR (0.615) followed in terms of AUC values. K‒M analysis revealed that children with elevated MLR, NLR, dNLR, and NLPR exhibited increased 30-day mortality.
Conclusion:
The predictive capacity of the NLPR is comparable to that of the PCIS, suggesting that the NLPR has potential as a robust prognostic indicator for septic children.
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