Utility of Shock Index and Pediatric Age-Adjusted Shock Index in Predicting Severe Sepsis and Septic Shock

Raziye Merve Yaradilmiş1, Aytaç Göktuğ2, İlknur Bodur3

  • 1Department of Pediatric Emergency Care, Etlik City Hospital, Ankara.

Pediatric Emergency Care
|October 3, 2025
PubMed

Insights

The shock index (SI) and pediatric age-adjusted shock index (SIPA) aid in early sepsis recognition in children. Combining these with lactate or immature granulocytes (IG%) improves accuracy in pediatric emergency departments.

Area of Science:

  • Pediatric Emergency Medicine
  • Critical Care
  • Clinical Diagnostics

Background:

  • Early recognition of severe sepsis and septic shock in pediatric emergency departments (PEDs) is critical for effective treatment.
  • The shock index (SI) and pediatric age-adjusted shock index (SIPA) show promise for early risk stratification.
  • This study evaluated the predictive performance of SI, SIPA, and modified indices for severe outcomes.

Purpose of the Study:

  • To assess the predictive performance of SI, SIPA, and modified shock index variations in identifying severe sepsis and septic shock in pediatric patients.
  • To determine the utility of these noninvasive tools in the pediatric emergency department setting.

Main Methods:

  • A retrospective cohort study of 238 pediatric patients (1 month to 18 years) meeting systemic inflammatory response syndrome criteria.
  • Collected clinical data and vital signs, calculating SI, SIPA, and modified indices.
  • Recorded biomarkers including lactate and immature granulocyte percentage (IG%).

Main Results:

  • Severe sepsis or septic shock occurred in 20.6% of patients (49/238).
  • SI (≥1.81) demonstrated an AUC of 0.815 with 81.6% sensitivity and 67.7% specificity.
  • Age-specific SI cutoffs improved prediction, especially in younger children. Combining SI with IG% or lactate enhanced diagnostic accuracy.

Conclusions:

  • SI and SIPA are practical tools for early sepsis detection in children.
  • Age adjustment of SI enhances its accuracy.
  • Integration of SI with biomarkers like IG% and lactate can improve clinical decision-making in PEDs.
Abstract

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